20570871800 has 48 divisors (see below), whose sum is σ = 47854872360. Its totient is φ = 8223601280.

The previous prime is 20570871757. The next prime is 20570871817. The reversal of 20570871800 is 817807502.

It is a super-2 number, since 2×20570871800² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328622 + ... + 386178.

Almost surely, 2^20570871800 is an apocalyptic number.

20570871800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20570871800 is an abundant number, since it is smaller than the sum of its proper divisors (27284000560).

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

20570871800 is a wasteful number, since it uses less digits than its factorization.

20570871800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59360 (or 59351 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The spelling of 20570871800 in words is "twenty billion, five hundred seventy million, eight hundred seventy-one thousand, eight hundred".