21250132465065 has 32 divisors (see below), whose sum is σ = 39437346063360. Its totient is φ = 9569356023744.

The previous prime is 21250132464893. The next prime is 21250132465151. The reversal of 21250132465065 is 56056423105212.

It is not a de Polignac number, because 21250132465065 - 2¹⁸ = 21250132202921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1510307995 + ... + 1510322064.

It is an arithmetic number, because the mean of its divisors is an integer number (1232417064480).

Almost surely, 2^{21250132465065} is an apocalyptic number.

It is an amenable number.

21250132465065 is a deficient number, since it is larger than the sum of its proper divisors (18187213598295).

21250132465065 is a wasteful number, since it uses less digits than its factorization.

21250132465065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020630141.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 21250132465065 in words is "twenty-one trillion, two hundred fifty billion, one hundred thirty-two million, four hundred sixty-five thousand, sixty-five".