21472605004257 has 48 divisors (see below), whose sum is σ = 33910851648960. Its totient is φ = 12984794035200.

The previous prime is 21472605004223. The next prime is 21472605004259. The reversal of 21472605004257 is 75240050627412.

21472605004257 is a `hidden beast` number, since 2 + 1 + 47 + 2 + 60 + 500 + 42 + 5 + 7 = 666.

It is not a de Polignac number, because 21472605004257 - 2⁸ = 21472605004001 is a prime.

It is a super-2 number, since 2×21472605004257² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21472605004259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88605469 + ... + 88847477.

It is an arithmetic number, because the mean of its divisors is an integer number (706476076020).

Almost surely, 2^{21472605004257} is an apocalyptic number.

It is an amenable number.

21472605004257 is a deficient number, since it is larger than the sum of its proper divisors (12438246644703).

21472605004257 is a wasteful number, since it uses less digits than its factorization.

21472605004257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244014 (or 244011 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

It can be divided in two parts, 2147260 and 5004257, that added together give a palindrome (7151517).

The spelling of 21472605004257 in words is "twenty-one trillion, four hundred seventy-two billion, six hundred five million, four thousand, two hundred fifty-seven".