20568503220 has 48 divisors (see below), whose sum is σ = 58012210368. Its totient is φ = 5444896000.

The previous prime is 20568503213. The next prime is 20568503231. The reversal of 20568503220 is 2230586502.

It is a super-2 number, since 2×20568503220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242906 + ... + 1259345.

It is an arithmetic number, because the mean of its divisors is an integer number (1208587716).

Almost surely, 2^20568503220 is an apocalyptic number.

20568503220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20568503220 is an abundant number, since it is smaller than the sum of its proper divisors (37443707148).

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

20568503220 is a wasteful number, since it uses less digits than its factorization.

20568503220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502400 (or 2502398 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 20568503220 in words is "twenty billion, five hundred sixty-eight million, five hundred three thousand, two hundred twenty".