21103132032 has 96 divisors (see below), whose sum is σ = 62820576000. Its totient is φ = 6791801856.

The previous prime is 21103132013. The next prime is 21103132051. The reversal of 21103132032 is 23023130112.

It is an interprime number because it is at equal distance from previous prime (21103132013) and next prime (21103132051).

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 (18).

It is a junction number, because it is equal to n+sod(n) for n = 21103131996 and 21103132014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282432 + ... + 349247.

It is an arithmetic number, because the mean of its divisors is an integer number (654381000).

Almost surely, 2^21103132032 is an apocalyptic number.

It is an amenable number.

21103132032 is an abundant number, since it is smaller than the sum of its proper divisors (41717443968).

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

21103132032 is a wasteful number, since it uses less digits than its factorization.

21103132032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631728 (or 631713 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21103132032 its reverse (23023130112), we get a palindrome (44126262144).

The spelling of 21103132032 in words is "twenty-one billion, one hundred three million, one hundred thirty-two thousand, thirty-two".