20926668800 has 84 divisors (see below), whose sum is σ = 51895478886. Its totient is φ = 8370585600.

The previous prime is 20926668793. The next prime is 20926668853. The reversal of 20926668800 is 886662902.

It can be written as a sum of positive squares in 3 ways, for example, as 8935542784 + 11991126016 = 94528^2 + 109504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153710 + ... + 255890.

Almost surely, 2^20926668800 is an apocalyptic number.

20926668800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20926668800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25947739443).

20926668800 is an abundant number, since it is smaller than the sum of its proper divisors (30968810086).

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

20926668800 is an equidigital number, since it uses as much as digits as its factorization.

20926668800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102217 (or 102188 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 20926668800 in words is "twenty billion, nine hundred twenty-six million, six hundred sixty-eight thousand, eight hundred".