16720515432 has 96 divisors (see below), whose sum is σ = 47711664000. Its totient is φ = 5275342080.

The previous prime is 16720515421. The next prime is 16720515433. The reversal of 16720515432 is 23451502761.

16720515432 is a `hidden beast` number, since 1 + 6 + 7 + 205 + 15 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16720515433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1679044 + ... + 1688972.

It is an arithmetic number, because the mean of its divisors is an integer number (496996500).

Almost surely, 2^16720515432 is an apocalyptic number.

16720515432 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 16720515432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23855832000).

16720515432 is an abundant number, since it is smaller than the sum of its proper divisors (30991148568).

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

16720515432 is a wasteful number, since it uses less digits than its factorization.

16720515432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11191 (or 11184 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 16720515432 in words is "sixteen billion, seven hundred twenty million, five hundred fifteen thousand, four hundred thirty-two".