20390079637920 has 192 divisors, whose sum is σ = 64409551629696. Its totient is φ = 5422069186560.

The previous prime is 20390079637897. The next prime is 20390079637937. The reversal of 20390079637920 is 2973697009302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259472235 + ... + 259550805.

It is an arithmetic number, because the mean of its divisors is an integer number (335466414738).

Almost surely, 2^{20390079637920} is an apocalyptic number.

20390079637920 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 20390079637920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32204775814848).

20390079637920 is an abundant number, since it is smaller than the sum of its proper divisors (44019471991776).

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

20390079637920 is a wasteful number, since it uses less digits than its factorization.

20390079637920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80103 (or 80095 counting only the distinct ones).

The product of its (nonzero) digits is 7715736, while the sum is 57.

The spelling of 20390079637920 in words is "twenty trillion, three hundred ninety billion, seventy-nine million, six hundred thirty-seven thousand, nine hundred twenty".