21113402013 has 24 divisors (see below), whose sum is σ = 33274253376. Its totient is φ = 12794212800.

The previous prime is 21113401999. The next prime is 21113402021. The reversal of 21113402013 is 31020431112.

It is not a de Polignac number, because 21113402013 - 2²² = 21109207709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113401013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1171833 + ... + 1189713.

It is an arithmetic number, because the mean of its divisors is an integer number (1386427224).

Almost surely, 2^21113402013 is an apocalyptic number.

It is an amenable number.

21113402013 is a deficient number, since it is larger than the sum of its proper divisors (12160851363).

21113402013 is a wasteful number, since it uses less digits than its factorization.

21113402013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29825 (or 29822 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21113402013 its reverse (31020431112), we get a palindrome (52133833125).

The spelling of 21113402013 in words is "twenty-one billion, one hundred thirteen million, four hundred two thousand, thirteen".