21228591374574 has 32 divisors (see below), whose sum is σ = 42540338252544. Its totient is φ = 7062346247040.

The previous prime is 21228591374567. The next prime is 21228591374651. The reversal of 21228591374574 is 47547319582212.

It is a congruent 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, 9112902 + ... + 11202774.

It is an arithmetic number, because the mean of its divisors is an integer number (1329385570392).

Almost surely, 2^{21228591374574} is an apocalyptic number.

21228591374574 is an abundant number, since it is smaller than the sum of its proper divisors (21311746877970).

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

21228591374574 is a wasteful number, since it uses less digits than its factorization.

21228591374574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093192.

The product of its digits is 33868800, while the sum is 60.

The spelling of 21228591374574 in words is "twenty-one trillion, two hundred twenty-eight billion, five hundred ninety-one million, three hundred seventy-four thousand, five hundred seventy-four".