21113015532 has 36 divisors (see below), whose sum is σ = 57306758040. Its totient is φ = 6032289984.

The previous prime is 21113015509. The next prime is 21113015563. The reversal of 21113015532 is 23551031112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17952657 + ... + 17953832.

It is an arithmetic number, because the mean of its divisors is an integer number (1591854390).

Almost surely, 2^21113015532 is an apocalyptic number.

It is an amenable number.

21113015532 is an abundant number, since it is smaller than the sum of its proper divisors (36193742508).

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

21113015532 is a wasteful number, since it uses less digits than its factorization.

21113015532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35906510 (or 35906501 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 21113015532 its reverse (23551031112), we get a palindrome (44664046644).

The spelling of 21113015532 in words is "twenty-one billion, one hundred thirteen million, fifteen thousand, five hundred thirty-two".