21962647204 has 9 divisors (see below), whose sum is σ = 38435151307. Its totient is φ = 10981175404.

The previous prime is 21962647127. The next prime is 21962647229. The reversal of 21962647204 is 40274626912.

The square root of 21962647204 is 148198.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 259347 + ... + 333445.

Almost surely, 2^21962647204 is an apocalyptic number.

21962647204 is the 148198-th square number.

It is an amenable number.

21962647204 is a deficient number, since it is larger than the sum of its proper divisors (16472504103).

21962647204 is an frugal number, since it uses more digits than its factorization.

21962647204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148202 (or 74101 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 21962647204 in words is "twenty-one billion, nine hundred sixty-two million, six hundred forty-seven thousand, two hundred four".