21357023635475 has 12 divisors (see below), whose sum is σ = 28890228336360. Its totient is φ = 15532380825600.

The previous prime is 21357023635471. The next prime is 21357023635477. The reversal of 21357023635475 is 57453632075312.

It is not a de Polignac number, because 21357023635475 - 2² = 21357023635471 is a prime.

It is a super-2 number, since 2×21357023635475² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21357023635471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38830951790 + ... + 38830952339.

It is an arithmetic number, because the mean of its divisors is an integer number (2407519028030).

Almost surely, 2^{21357023635475} is an apocalyptic number.

21357023635475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21357023635475 is a deficient number, since it is larger than the sum of its proper divisors (7533204700885).

21357023635475 is a wasteful number, since it uses less digits than its factorization.

21357023635475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77661904150 (or 77661904145 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 53.

The spelling of 21357023635475 in words is "twenty-one trillion, three hundred fifty-seven billion, twenty-three million, six hundred thirty-five thousand, four hundred seventy-five".