20370203856 has 30 divisors (see below), whose sum is σ = 57008279250. Its totient is φ = 6790067904.

The previous prime is 20370203827. The next prime is 20370203863. The reversal of 20370203856 is 65830207302.

20370203856 is a `hidden beast` number, since 2 + 0 + 370 + 203 + 85 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19316552256 + 1053651600 = 138984^2 + 32460^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20370203856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70729731 + ... + 70730018.

It is an arithmetic number, because the mean of its divisors is an integer number (1900275975).

Almost surely, 2^20370203856 is an apocalyptic number.

It is an amenable number.

20370203856 is an abundant number, since it is smaller than the sum of its proper divisors (36638075394).

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

20370203856 is a wasteful number, since it uses less digits than its factorization.

20370203856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141459763 (or 141459754 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20370203856 in words is "twenty billion, three hundred seventy million, two hundred three thousand, eight hundred fifty-six".