21612572353004 has 48 divisors (see below), whose sum is σ = 38560047926400. Its totient is φ = 10597364474496.

The previous prime is 21612572352991. The next prime is 21612572353037. The reversal of 21612572353004 is 40035327521612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274033544 + ... + 274112400.

It is an arithmetic number, because the mean of its divisors is an integer number (803334331800).

Almost surely, 2^{21612572353004} is an apocalyptic number.

It is an amenable number.

21612572353004 is a deficient number, since it is larger than the sum of its proper divisors (16947475573396).

21612572353004 is a wasteful number, since it uses less digits than its factorization.

21612572353004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85022 (or 85020 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

Adding to 21612572353004 its reverse (40035327521612), we get a palindrome (61647899874616).

The spelling of 21612572353004 in words is "twenty-one trillion, six hundred twelve billion, five hundred seventy-two million, three hundred fifty-three thousand, four".