21013131032 has 16 divisors (see below), whose sum is σ = 39954546000. Its totient is φ = 10358585440.

The previous prime is 21013131019. The next prime is 21013131053. The reversal of 21013131032 is 23013131012.

It is a self number, because there is not a number n which added to its sum of digits gives 21013131032.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 18496907 + ... + 18498042.

It is an arithmetic number, because the mean of its divisors is an integer number (2497159125).

Almost surely, 2^21013131032 is an apocalyptic number.

It is an amenable number.

21013131032 is a deficient number, since it is larger than the sum of its proper divisors (18941414968).

21013131032 is a wasteful number, since it uses less digits than its factorization.

21013131032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36995026 (or 36995022 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21013131032 its reverse (23013131012), we get a palindrome (44026262044).

The spelling of 21013131032 in words is "twenty-one billion, thirteen million, one hundred thirty-one thousand, thirty-two".