21616118832 has 160 divisors (see below), whose sum is σ = 72021818880. Its totient is φ = 5420943360.

The previous prime is 21616118807. The next prime is 21616118837. The reversal of 21616118832 is 23881161612.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21616118837) 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, 6348 + ... + 208020.

It is an arithmetic number, because the mean of its divisors is an integer number (450136368).

Almost surely, 2^21616118832 is an apocalyptic number.

21616118832 is a gapful number since it is divisible by the number (22) 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 21616118832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36010909440).

21616118832 is an abundant number, since it is smaller than the sum of its proper divisors (50405700048).

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

21616118832 is a wasteful number, since it uses less digits than its factorization.

21616118832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201731 (or 201725 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The spelling of 21616118832 in words is "twenty-one billion, six hundred sixteen million, one hundred eighteen thousand, eight hundred thirty-two".