204023613 has 16 divisors (see below), whose sum is σ = 297967680. Its totient is φ = 123599616.

The previous prime is 204023609. The next prime is 204023621. The reversal of 204023613 is 316320402.

It is a happy number.

204023613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204023613 - 2² = 204023609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204023613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204023623) 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, 67495 + ... + 70452.

It is an arithmetic number, because the mean of its divisors is an integer number (18622980).

Almost surely, 2^204023613 is an apocalyptic number.

It is an amenable number.

204023613 is a deficient number, since it is larger than the sum of its proper divisors (93944067).

204023613 is a wasteful number, since it uses less digits than its factorization.

204023613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137996.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 204023613 is about 14283.6834535074. The cubic root of 204023613 is about 588.6992439149.

The spelling of 204023613 in words is "two hundred four million, twenty-three thousand, six hundred thirteen".