19559949120 has 224 divisors, whose sum is σ = 69717513600. Its totient is φ = 5161992192.

The previous prime is 19559949109. The next prime is 19559949127. The reversal of 19559949120 is 2194995591.

19559949120 is a `hidden beast` number, since 1 + 9 + 5 + 599 + 49 + 1 + 2 + 0 = 666.

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 (19559949127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 826411 + ... + 849749.

It is an arithmetic number, because the mean of its divisors is an integer number (311238900).

Almost surely, 2^19559949120 is an apocalyptic number.

19559949120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19559949120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34858756800).

19559949120 is an abundant number, since it is smaller than the sum of its proper divisors (50157564480).

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

19559949120 is a wasteful number, since it uses less digits than its factorization.

19559949120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23462 (or 23446 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 54.

The spelling of 19559949120 in words is "nineteen billion, five hundred fifty-nine million, nine hundred forty-nine thousand, one hundred twenty".