21619672892416 has 33 divisors (see below), whose sum is σ = 43218530260311. Its totient is φ = 10809762051072.

The previous prime is 21619672892359. The next prime is 21619672892527. The reversal of 21619672892416 is 61429827691612.

The square root of 21619672892416 is 4649696.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

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, 148717621 + ... + 148862923.

Almost surely, 2^{21619672892416} is an apocalyptic number.

21619672892416 is the 4649696-th square number.

It is an amenable number.

21619672892416 is a deficient number, since it is larger than the sum of its proper divisors (21598857367895).

21619672892416 is an frugal number, since it uses more digits than its factorization.

21619672892416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290626 (or 145305 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 64.

21619672892416 divided by its sum of digits (64) gives a square (337807388944 = 581212²).

The spelling of 21619672892416 in words is "twenty-one trillion, six hundred nineteen billion, six hundred seventy-two million, eight hundred ninety-two thousand, four hundred sixteen".