20320372731960 has 640 divisors, whose sum is σ = 80695082603520. Its totient is φ = 4489850953728.

The previous prime is 20320372731959. The next prime is 20320372731979. The reversal of 20320372731960 is 6913727302302.

20320372731960 is a `hidden beast` number, since 2 + 0 + 3 + 20 + 372 + 73 + 196 + 0 = 666.

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 159 ways as a sum of consecutive naturals, for example, 94490877 + ... + 94705683.

It is an arithmetic number, because the mean of its divisors is an integer number (126086066568).

Almost surely, 2^{20320372731960} is an apocalyptic number.

20320372731960 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 20320372731960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40347541301760).

20320372731960 is an abundant number, since it is smaller than the sum of its proper divisors (60374709871560).

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

20320372731960 is a wasteful number, since it uses less digits than its factorization.

20320372731960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214977 (or 214964 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The spelling of 20320372731960 in words is "twenty trillion, three hundred twenty billion, three hundred seventy-two million, seven hundred thirty-one thousand, nine hundred sixty".