21230544264004 has 24 divisors (see below), whose sum is σ = 37944805933440. Its totient is φ = 10390127171424.

The previous prime is 21230544263993. The next prime is 21230544264019. The reversal of 21230544264004 is 40046244503212.

It is a super-2 number, since 2×21230544264004² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119414844 + ... + 119592499.

It is an arithmetic number, because the mean of its divisors is an integer number (1581033580560).

Almost surely, 2^{21230544264004} is an apocalyptic number.

It is an amenable number.

21230544264004 is a deficient number, since it is larger than the sum of its proper divisors (16714261669436).

21230544264004 is a wasteful number, since it uses less digits than its factorization.

21230544264004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239007819 (or 239007817 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 21230544264004 its reverse (40046244503212), we get a palindrome (61276788767216).

The spelling of 21230544264004 in words is "twenty-one trillion, two hundred thirty billion, five hundred forty-four million, two hundred sixty-four thousand, four".