21712934561796 has 63 divisors (see below), whose sum is σ = 56971051966423. Its totient is φ = 7237560979080.

The previous prime is 21712934561741. The next prime is 21712934561809. The reversal of 21712934561796 is 69716543921712.

The square root of 21712934561796 is 4659714.

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

21712934561796 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 2 + 9 + 3 + 4 + 5 + 617 + 9 + 6 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 251581411 + ... + 251667701.

Almost surely, 2^{21712934561796} is an apocalyptic number.

21712934561796 is the 4659714-th square number.

It is an amenable number.

21712934561796 is an abundant number, since it is smaller than the sum of its proper divisors (35258117404627).

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

21712934561796 is an frugal number, since it uses more digits than its factorization.

21712934561796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172604 (or 86296 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 21712934561796 in words is "twenty-one trillion, seven hundred twelve billion, nine hundred thirty-four million, five hundred sixty-one thousand, seven hundred ninety-six".