204249994 has 16 divisors (see below), whose sum is σ = 331625448. Its totient is φ = 93788352.

The previous prime is 204249973. The next prime is 204250009. The reversal of 204249994 is 499942402.

It can be written as a sum of positive squares in 4 ways, for example, as 163456225 + 40793769 = 12785^2 + 6387^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204249994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14817 + ... + 25060.

Almost surely, 2^204249994 is an apocalyptic number.

204249994 is a deficient number, since it is larger than the sum of its proper divisors (127375454).

204249994 is a wasteful number, since it uses less digits than its factorization.

204249994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40089.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 204249994 is about 14291.6057180430. The cubic root of 204249994 is about 588.9169001957.

The spelling of 204249994 in words is "two hundred four million, two hundred forty-nine thousand, nine hundred ninety-four".