204308163490 has 24 divisors (see below), whose sum is σ = 384439227228. Its totient is φ = 78170077920.

The previous prime is 204308163481. The next prime is 204308163529. The reversal of 204308163490 is 94361803402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 198008090361 + 6300073129 = 444981^2 + 79373^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19305501 + ... + 19316080.

Almost surely, 2^204308163490 is an apocalyptic number.

204308163490 is a deficient number, since it is larger than the sum of its proper divisors (180131063738).

204308163490 is a wasteful number, since it uses less digits than its factorization.

204308163490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38621634 (or 38621611 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

Adding to 204308163490 its reverse (94361803402), we get a palindrome (298669966892).

The spelling of 204308163490 in words is "two hundred four billion, three hundred eight million, one hundred sixty-three thousand, four hundred ninety".