20185202988740 has 24 divisors (see below), whose sum is σ = 43188717340440. Its totient is φ = 7921740040448.

The previous prime is 20185202988737. The next prime is 20185202988761. The reversal of 20185202988740 is 4788920258102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3157217244736 + 17027985744004 = 1776856^2 + 4126498^2 .

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, 9521321105 + ... + 9521323224.

It is an arithmetic number, because the mean of its divisors is an integer number (1799529889185).

Almost surely, 2^{20185202988740} is an apocalyptic number.

20185202988740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20185202988740 is an abundant number, since it is smaller than the sum of its proper divisors (23003514351700).

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

20185202988740 is a wasteful number, since it uses less digits than its factorization.

20185202988740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19042644391 (or 19042644389 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 56.

The spelling of 20185202988740 in words is "twenty trillion, one hundred eighty-five billion, two hundred two million, nine hundred eighty-eight thousand, seven hundred forty".