21113025004 has 24 divisors (see below), whose sum is σ = 37562019488. Its totient is φ = 10381098240.

The previous prime is 21113025001. The next prime is 21113025019. The reversal of 21113025004 is 40052031112.

It is not an unprimeable number, because it can be changed into a prime (21113025001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621729 + ... + 1634695.

Almost surely, 2^21113025004 is an apocalyptic number.

It is an amenable number.

21113025004 is a deficient number, since it is larger than the sum of its proper divisors (16448994484).

21113025004 is a wasteful number, since it uses less digits than its factorization.

21113025004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19705 (or 19703 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21113025004 its reverse (40052031112), we get a palindrome (61165056116).

The spelling of 21113025004 in words is "twenty-one billion, one hundred thirteen million, twenty-five thousand, four".