20257922880 has 896 divisors, whose sum is σ = 81295280640. Its totient is φ = 4715642880.

The previous prime is 20257922849. The next prime is 20257922929. The reversal of 20257922880 is 8822975202.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 244071319 + ... + 244071401.

It is an arithmetic number, because the mean of its divisors is an integer number (90731340).

Almost surely, 2^20257922880 is an apocalyptic number.

20257922880 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 20257922880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40647640320).

20257922880 is an abundant number, since it is smaller than the sum of its proper divisors (61037357760).

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

20257922880 is a wasteful number, since it uses less digits than its factorization.

20257922880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 20257922880 in words is "twenty billion, two hundred fifty-seven million, nine hundred twenty-two thousand, eight hundred eighty".