20959920000 has 480 divisors, whose sum is σ = 77235495480. Its totient is φ = 5451264000.

The previous prime is 20959919993. The next prime is 20959920073. The reversal of 20959920000 is 2995902.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 30959662 + ... + 30960338.

Almost surely, 2^20959920000 is an apocalyptic number.

20959920000 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 20959920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38617747740).

20959920000 is an abundant number, since it is smaller than the sum of its proper divisors (56275575480).

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

20959920000 is an equidigital number, since it uses as much as digits as its factorization.

20959920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The spelling of 20959920000 in words is "twenty billion, nine hundred fifty-nine million, nine hundred twenty thousand".