20370031818 has 16 divisors (see below), whose sum is σ = 41197818240. Its totient is φ = 6713718176.

The previous prime is 20370031789. The next prime is 20370031859. The reversal of 20370031818 is 81813007302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19072530 + ... + 19073597.

It is an arithmetic number, because the mean of its divisors is an integer number (2574863640).

Almost surely, 2^20370031818 is an apocalyptic number.

20370031818 is an abundant number, since it is smaller than the sum of its proper divisors (20827786422).

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

20370031818 is a wasteful number, since it uses less digits than its factorization.

20370031818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38146221.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 20370031818 in words is "twenty billion, three hundred seventy million, thirty-one thousand, eight hundred eighteen".