20653654320 has 160 divisors (see below), whose sum is σ = 76612804800. Its totient is φ = 5083969536.

The previous prime is 20653654309. The next prime is 20653654321. The reversal of 20653654320 is 2345635602.

20653654320 is a `hidden beast` number, since 2 + 0 + 65 + 36 + 543 + 20 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20653654321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339685 + ... + 395844.

It is an arithmetic number, because the mean of its divisors is an integer number (478830030).

Almost surely, 2^20653654320 is an apocalyptic number.

20653654320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20653654320 is an abundant number, since it is smaller than the sum of its proper divisors (55959150480).

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

20653654320 is a wasteful number, since it uses less digits than its factorization.

20653654320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735564 (or 735552 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 20653654320 in words is "twenty billion, six hundred fifty-three million, six hundred fifty-four thousand, three hundred twenty".