21136526345154 has 32 divisors (see below), whose sum is σ = 46116224329536. Its totient is φ = 6404984809920.

The previous prime is 21136526345149. The next prime is 21136526345167. The reversal of 21136526345154 is 45154362563112.

It is a happy number.

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, 29699244 + ... + 30402600.

It is an arithmetic number, because the mean of its divisors is an integer number (1441132010298).

Almost surely, 2^{21136526345154} is an apocalyptic number.

21136526345154 is an abundant number, since it is smaller than the sum of its proper divisors (24979697984382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21136526345154 is a wasteful number, since it uses less digits than its factorization.

21136526345154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158690.

The product of its digits is 2592000, while the sum is 48.

The spelling of 21136526345154 in words is "twenty-one trillion, one hundred thirty-six billion, five hundred twenty-six million, three hundred forty-five thousand, one hundred fifty-four".