19649980350 has 960 divisors, whose sum is σ = 75862144512. Its totient is φ = 3639168000.

The previous prime is 19649980327. The next prime is 19649980373. The reversal of 19649980350 is 5308994691.

It is an interprime number because it is at equal distance from previous prime (19649980327) and next prime (19649980373).

It is a super-2 number, since 2×19649980350² (a number of 21 digits) contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 149999785 + ... + 149999915.

Almost surely, 2^19649980350 is an apocalyptic number.

19649980350 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 19649980350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37931072256).

19649980350 is an abundant number, since it is smaller than the sum of its proper divisors (56212164162).

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

19649980350 is a wasteful number, since it uses less digits than its factorization.

19649980350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

It can be divided in two parts, 19649 and 980350, that added together give a palindrome (999999).

The spelling of 19649980350 in words is "nineteen billion, six hundred forty-nine million, nine hundred eighty thousand, three hundred fifty".