20039317920 has 192 divisors, whose sum is σ = 70420855680. Its totient is φ = 5322240000.

The previous prime is 20039317913. The next prime is 20039317933. The reversal of 20039317920 is 2971393002.

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

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, 1075080 + ... + 1093560.

It is an arithmetic number, because the mean of its divisors is an integer number (366775290).

Almost surely, 2^20039317920 is an apocalyptic number.

20039317920 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 20039317920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35210427840).

20039317920 is an abundant number, since it is smaller than the sum of its proper divisors (50381537760).

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

20039317920 is a wasteful number, since it uses less digits than its factorization.

20039317920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18756 (or 18742 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The spelling of 20039317920 in words is "twenty billion, thirty-nine million, three hundred seventeen thousand, nine hundred twenty".