20499366976 has 63 divisors (see below), whose sum is σ = 44740154487. Its totient is φ = 9312167040.

The previous prime is 20499366971. The next prime is 20499366991. The reversal of 20499366976 is 67966399402.

The square root of 20499366976 is 143176.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20499366971) 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, 12598675 + ... + 12600301.

Almost surely, 2^20499366976 is an apocalyptic number.

20499366976 is the 143176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20499366976

20499366976 is an abundant number, since it is smaller than the sum of its proper divisors (24240787511).

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

20499366976 is an frugal number, since it uses more digits than its factorization.

20499366976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 61.

The spelling of 20499366976 in words is "twenty billion, four hundred ninety-nine million, three hundred sixty-six thousand, nine hundred seventy-six".