20856473370 has 48 divisors (see below), whose sum is σ = 56584524672. Its totient is φ = 5319911520.

The previous prime is 20856473359. The next prime is 20856473383. The reversal of 20856473370 is 7337465802.

20856473370 is a `hidden beast` number, since 208 + 5 + 6 + 4 + 73 + 370 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5035726 + ... + 5039865.

It is an arithmetic number, because the mean of its divisors is an integer number (1178844264).

Almost surely, 2^20856473370 is an apocalyptic number.

20856473370 is an abundant number, since it is smaller than the sum of its proper divisors (35728051302).

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

20856473370 is a wasteful number, since it uses less digits than its factorization.

20856473370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075627 (or 10075624 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 20856473370 in words is "twenty billion, eight hundred fifty-six million, four hundred seventy-three thousand, three hundred seventy".