21136657382357 has 16 divisors (see below), whose sum is σ = 24564190533120. Its totient is φ = 17984496610800.

The previous prime is 21136657382333. The next prime is 21136657382359. The reversal of 21136657382357 is 75328375663112.

It is not a de Polignac number, because 21136657382357 - 2⁸ = 21136657382101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21136657382296 and 21136657382305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136657382359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609213569 + ... + 609248262.

It is an arithmetic number, because the mean of its divisors is an integer number (1535261908320).

Almost surely, 2^{21136657382357} is an apocalyptic number.

It is an amenable number.

21136657382357 is a deficient number, since it is larger than the sum of its proper divisors (3427533150763).

21136657382357 is a wasteful number, since it uses less digits than its factorization.

21136657382357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218461944.

The product of its digits is 38102400, while the sum is 59.

The spelling of 21136657382357 in words is "twenty-one trillion, one hundred thirty-six billion, six hundred fifty-seven million, three hundred eighty-two thousand, three hundred fifty-seven".