20807620320 has 48 divisors (see below), whose sum is σ = 65544005520. Its totient is φ = 5548698624.

The previous prime is 20807620319. The next prime is 20807620333. The reversal of 20807620320 is 2302670802.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21674125 + ... + 21675084.

It is an arithmetic number, because the mean of its divisors is an integer number (1365500115).

Almost surely, 2^20807620320 is an apocalyptic number.

20807620320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20807620320 is an abundant number, since it is smaller than the sum of its proper divisors (44736385200).

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

20807620320 is a wasteful number, since it uses less digits than its factorization.

20807620320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43349227 (or 43349219 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The spelling of 20807620320 in words is "twenty billion, eight hundred seven million, six hundred twenty thousand, three hundred twenty".