20791246320 has 160 divisors (see below), whose sum is σ = 77123188800. Its totient is φ = 5117838336.

The previous prime is 20791246309. The next prime is 20791246331. The reversal of 20791246320 is 2364219702.

20791246320 is a `hidden beast` number, since 2 + 0 + 7 + 9 + 12 + 4 + 632 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20791246309) and next prime (20791246331).

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 31 ways as a sum of consecutive naturals, for example, 342135 + ... + 398294.

It is an arithmetic number, because the mean of its divisors is an integer number (482019930).

Almost surely, 2^20791246320 is an apocalyptic number.

20791246320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20791246320 is an abundant number, since it is smaller than the sum of its proper divisors (56331942480).

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

20791246320 is a wasteful number, since it uses less digits than its factorization.

20791246320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740464 (or 740452 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20791246320 in words is "twenty billion, seven hundred ninety-one million, two hundred forty-six thousand, three hundred twenty".