21940719376 has 45 divisors (see below), whose sum is σ = 44888307861. Its totient is φ = 10387639872.

The previous prime is 21940719373. The next prime is 21940719391. The reversal of 21940719376 is 67391704912.

The square root of 21940719376 is 148124.

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., 17668789776 + 4271929600 = 132924^2 + 65360^2 .

It is not an unprimeable number, because it can be changed into a prime (21940719373) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11256450 + ... + 11258398.

Almost surely, 2^21940719376 is an apocalyptic number.

21940719376 is the 148124-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21940719376

21940719376 is an abundant number, since it is smaller than the sum of its proper divisors (22947588485).

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

21940719376 is an frugal number, since it uses more digits than its factorization.

21940719376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

Multiplying 21940719376 by its sum of digits (49), we get a square (1075095249424 = 1036868²).

The spelling of 21940719376 in words is "twenty-one billion, nine hundred forty million, seven hundred nineteen thousand, three hundred seventy-six".