21932999159824 has 135 divisors (see below), whose sum is σ = 45019805137437. Its totient is φ = 10350996399744.

The previous prime is 21932999159801. The next prime is 21932999159837. The reversal of 21932999159824 is 42895199923912.

The square root of 21932999159824 is 4683268.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11501132734224 + 10431866425600 = 3391332^2 + 3229840^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25533176707 + ... + 25533177565.

Almost surely, 2^{21932999159824} is an apocalyptic number.

21932999159824 is the 4683268-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21932999159824

21932999159824 is an abundant number, since it is smaller than the sum of its proper divisors (23086805977613).

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

21932999159824 is an frugal number, since it uses more digits than its factorization.

21932999159824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 937 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 73.

The spelling of 21932999159824 in words is "twenty-one trillion, nine hundred thirty-two billion, nine hundred ninety-nine million, one hundred fifty-nine thousand, eight hundred twenty-four".