204001900 has 18 divisors (see below), whose sum is σ = 442684340. Its totient is φ = 81600720.

The previous prime is 204001891. The next prime is 204001907. The reversal of 204001900 is 9100402.

It is a super-2 number, since 2×204001900² = 83233550407220000, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (204001907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1019910 + ... + 1020109.

Almost surely, 2^204001900 is an apocalyptic number.

204001900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204001900 is an abundant number, since it is smaller than the sum of its proper divisors (238682440).

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

204001900 is a wasteful number, since it uses less digits than its factorization.

204001900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040033 (or 2040026 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 204001900 is about 14282.9233702348. The cubic root of 204001900 is about 588.6783592732.

The spelling of 204001900 in words is "two hundred four million, one thousand, nine hundred".