21357017436151 has 32 divisors (see below), whose sum is σ = 23385157705728. Its totient is φ = 19429083233280.

The previous prime is 21357017436127. The next prime is 21357017436163. The reversal of 21357017436151 is 15163471075312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21357017436151 - 2²⁹ = 21356480565239 is a prime.

It is a super-2 number, since 2×21357017436151² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21357017436191) 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, 13988826 + ... + 15440248.

It is an arithmetic number, because the mean of its divisors is an integer number (730786178304).

Almost surely, 2^{21357017436151} is an apocalyptic number.

21357017436151 is a deficient number, since it is larger than the sum of its proper divisors (2028140269577).

21357017436151 is a wasteful number, since it uses less digits than its factorization.

21357017436151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451751.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 21357017436151 in words is "twenty-one trillion, three hundred fifty-seven billion, seventeen million, four hundred thirty-six thousand, one hundred fifty-one".