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12994447950 = 23352115571571
BaseRepresentation
bin11000001101000011…
…11000101001001110
31020112121100100111000
430012201320221032
5203103034313300
65545232041130
7640004661621
oct140641705116
936477310430
1012994447950
115569033090
1226279931a6
1312c11a9873
148b3b21db8
15510c06c00
hex306878a4e

12994447950 has 192 divisors, whose sum is σ = 39157136640. Its totient is φ = 3142512000.

The previous prime is 12994447927. The next prime is 12994447951. The reversal of 12994447950 is 5974449921.

12994447950 is a `hidden beast` number, since 1 + 29 + 94 + 447 + 95 + 0 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12994447951) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8270665 + ... + 8272235.

It is an arithmetic number, because the mean of its divisors is an integer number (203943420).

Almost surely, 212994447950 is an apocalyptic number.

12994447950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12994447950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19578568320).

12994447950 is an abundant number, since it is smaller than the sum of its proper divisors (26162688690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12994447950 is a wasteful number, since it uses less digits than its factorization.

12994447950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 12994447950 in words is "twelve billion, nine hundred ninety-four million, four hundred forty-seven thousand, nine hundred fifty".