204954131816 has 32 divisors (see below), whose sum is σ = 448150440000. Its totient is φ = 87837483888.

The previous prime is 204954131803. The next prime is 204954131839. The reversal of 204954131816 is 618131459402.

It is a super-2 number, since 2×204954131816² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37343126 + ... + 37348613.

It is an arithmetic number, because the mean of its divisors is an integer number (14004701250).

Almost surely, 2^204954131816 is an apocalyptic number.

It is an amenable number.

204954131816 is an abundant number, since it is smaller than the sum of its proper divisors (243196308184).

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

204954131816 is an equidigital number, since it uses as much as digits as its factorization.

204954131816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74691766 (or 74691748 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 204954131816 in words is "two hundred four billion, nine hundred fifty-four million, one hundred thirty-one thousand, eight hundred sixteen".