19929515232 has 96 divisors (see below), whose sum is σ = 57118811904. Its totient is φ = 6034176000.

The previous prime is 19929515219. The next prime is 19929515237. The reversal of 19929515232 is 23251592991.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19929515237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1362357 + ... + 1376907.

It is an arithmetic number, because the mean of its divisors is an integer number (594987624).

Almost surely, 2^19929515232 is an apocalyptic number.

19929515232 is a gapful number since it is divisible by the number (12) 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 19929515232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28559405952).

19929515232 is an abundant number, since it is smaller than the sum of its proper divisors (37189296672).

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

19929515232 is a wasteful number, since it uses less digits than its factorization.

19929515232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872 (or 15864 counting only the distinct ones).

The product of its digits is 437400, while the sum is 48.

The spelling of 19929515232 in words is "nineteen billion, nine hundred twenty-nine million, five hundred fifteen thousand, two hundred thirty-two".