203165420 has 12 divisors (see below), whose sum is σ = 426647424. Its totient is φ = 81266160.

The previous prime is 203165401. The next prime is 203165437. The reversal of 203165420 is 24561302.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5079116 + ... + 5079155.

It is an arithmetic number, because the mean of its divisors is an integer number (35553952).

Almost surely, 2^203165420 is an apocalyptic number.

203165420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203165420 is an abundant number, since it is smaller than the sum of its proper divisors (223482004).

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

203165420 is a wasteful number, since it uses less digits than its factorization.

203165420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158280 (or 10158278 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 203165420 is about 14253.6107706083. The cubic root of 203165420 is about 587.8726605024.

The spelling of 203165420 in words is "two hundred three million, one hundred sixty-five thousand, four hundred twenty".