204051603 has 16 divisors (see below), whose sum is σ = 312569856. Its totient is φ = 115988160.

The previous prime is 204051593. The next prime is 204051611. The reversal of 204051603 is 306150402.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-204051603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 204051603.

It is not an unprimeable number, because it can be changed into a prime (204051623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21426 + ... + 29447.

It is an arithmetic number, because the mean of its divisors is an integer number (19535616).

Almost surely, 2^204051603 is an apocalyptic number.

204051603 is a deficient number, since it is larger than the sum of its proper divisors (108518253).

204051603 is a wasteful number, since it uses less digits than its factorization.

204051603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51074.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 204051603 is about 14284.6632091905. The cubic root of 204051603 is about 588.7261639008.

The spelling of 204051603 in words is "two hundred four million, fifty-one thousand, six hundred three".