21103130232 has 40 divisors (see below), whose sum is σ = 59108306400. Its totient is φ = 7034376528.

The previous prime is 21103130219. The next prime is 21103130261. The reversal of 21103130232 is 23203130112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16282632 + ... + 16283927.

It is an arithmetic number, because the mean of its divisors is an integer number (1477707660).

Almost surely, 2^21103130232 is an apocalyptic number.

It is an amenable number.

21103130232 is an abundant number, since it is smaller than the sum of its proper divisors (38005176168).

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

21103130232 is a wasteful number, since it uses less digits than its factorization.

21103130232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32566577 (or 32566564 counting only the distinct ones).

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

Adding to 21103130232 its reverse (23203130112), we get a palindrome (44306260344).

The spelling of 21103130232 in words is "twenty-one billion, one hundred three million, one hundred thirty thousand, two hundred thirty-two".