21896813075 has 24 divisors (see below), whose sum is σ = 27945086400. Its totient is φ = 17012972960.

The previous prime is 21896813063. The next prime is 21896813171. The reversal of 21896813075 is 57031869812.

It is a de Polignac number, because none of the positive numbers 2^k-21896813075 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32996 + ... + 211854.

It is an arithmetic number, because the mean of its divisors is an integer number (1164378600).

Almost surely, 2^21896813075 is an apocalyptic number.

21896813075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21896813075 is a deficient number, since it is larger than the sum of its proper divisors (6048273325).

21896813075 is a wasteful number, since it uses less digits than its factorization.

21896813075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179011 (or 179006 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 21896813075 in words is "twenty-one billion, eight hundred ninety-six million, eight hundred thirteen thousand, seventy-five".