21747323445234 has 16 divisors (see below), whose sum is σ = 43722367557120. Its totient is φ = 7211154370640.

The previous prime is 21747323445121. The next prime is 21747323445269. The reversal of 21747323445234 is 43254432374712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9488359869 + ... + 9488362160.

It is an arithmetic number, because the mean of its divisors is an integer number (2732647972320).

Almost surely, 2^{21747323445234} is an apocalyptic number.

21747323445234 is an abundant number, since it is smaller than the sum of its proper divisors (21975044111886).

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

21747323445234 is a wasteful number, since it uses less digits than its factorization.

21747323445234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18976722225.

The product of its digits is 13547520, while the sum is 51.

The spelling of 21747323445234 in words is "twenty-one trillion, seven hundred forty-seven billion, three hundred twenty-three million, four hundred forty-five thousand, two hundred thirty-four".