204138831402 has 48 divisors (see below), whose sum is σ = 482543586720. Its totient is φ = 61855941600.

The previous prime is 204138831397. The next prime is 204138831427.

It is a happy number.

204138831402 is a `hidden beast` number, since 20 + 413 + 8 + 83 + 140 + 2 = 666.

204138831402 is nontrivially palindromic in base 10.

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 23 ways as a sum of consecutive naturals, for example, 3898152 + ... + 3950172.

It is an arithmetic number, because the mean of its divisors is an integer number (10052991390).

Almost surely, 2^204138831402 is an apocalyptic number.

204138831402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

204138831402 is an abundant number, since it is smaller than the sum of its proper divisors (278404755318).

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

204138831402 is a wasteful number, since it uses less digits than its factorization.

204138831402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71859 (or 71856 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 204138831402 in words is "two hundred four billion, one hundred thirty-eight million, eight hundred thirty-one thousand, four hundred two".