21612572053510 has 64 divisors (see below), whose sum is σ = 41515729113600. Its totient is φ = 8076933833472.

The previous prime is 21612572053493. The next prime is 21612572053511. The reversal of 21612572053510 is 1535027521612.

It is a super-2 number, since 2×21612572053510² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612572053511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131391537 + ... + 131555923.

It is an arithmetic number, because the mean of its divisors is an integer number (648683267400).

Almost surely, 2^{21612572053510} is an apocalyptic number.

21612572053510 is a deficient number, since it is larger than the sum of its proper divisors (19903157060090).

21612572053510 is a wasteful number, since it uses less digits than its factorization.

21612572053510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173965.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 21612572053510 in words is "twenty-one trillion, six hundred twelve billion, five hundred seventy-two million, fifty-three thousand, five hundred ten".