19907799024 has 160 divisors (see below), whose sum is σ = 55996416000. Its totient is φ = 6073996032.

The previous prime is 19907799011. The next prime is 19907799047. The reversal of 19907799024 is 42099770991.

It is a Cunningham number, because it is equal to 141095²-1.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3383317 + ... + 3389195.

It is an arithmetic number, because the mean of its divisors is an integer number (349977600).

Almost surely, 2^19907799024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19907799024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27998208000).

19907799024 is an abundant number, since it is smaller than the sum of its proper divisors (36088616976).

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

19907799024 is a wasteful number, since it uses less digits than its factorization.

19907799024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035 (or 6029 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 57.

The spelling of 19907799024 in words is "nineteen billion, nine hundred seven million, seven hundred ninety-nine thousand, twenty-four".