201812904 has 32 divisors (see below), whose sum is σ = 560592000. Its totient is φ = 67270896.

The previous prime is 201812873. The next prime is 201812909. The reversal of 201812904 is 409218102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (201812909) by changing a digit.

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, 466944 + ... + 467375.

It is an arithmetic number, because the mean of its divisors is an integer number (17518500).

Almost surely, 2^201812904 is an apocalyptic number.

201812904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201812904 is an abundant number, since it is smaller than the sum of its proper divisors (358779096).

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

201812904 is a wasteful number, since it uses less digits than its factorization.

201812904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934334 (or 934324 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 201812904 is about 14206.0868644395. The cubic root of 201812904 is about 586.5652232198.

The spelling of 201812904 in words is "two hundred one million, eight hundred twelve thousand, nine hundred four".