203421804 has 24 divisors (see below), whose sum is σ = 479546928. Its totient is φ = 67107840.

The previous prime is 203421739. The next prime is 203421811. The reversal of 203421804 is 408124302.

It is a super-2 number, since 2×203421804² = 82760860685228832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86217 + ... + 88544.

It is an arithmetic number, because the mean of its divisors is an integer number (19981122).

Almost surely, 2^203421804 is an apocalyptic number.

It is an amenable number.

203421804 is an abundant number, since it is smaller than the sum of its proper divisors (276125124).

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

203421804 is a wasteful number, since it uses less digits than its factorization.

203421804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174865 (or 174863 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 203421804 is about 14262.6015859660. The cubic root of 203421804 is about 588.1198446080.

The spelling of 203421804 in words is "two hundred three million, four hundred twenty-one thousand, eight hundred four".