203185980172 has 48 divisors (see below), whose sum is σ = 408929407488. Its totient is φ = 86532001920.

The previous prime is 203185980169. The next prime is 203185980197. The reversal of 203185980172 is 271089581302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30049272 + ... + 30056032.

It is an arithmetic number, because the mean of its divisors is an integer number (8519362656).

Almost surely, 2^203185980172 is an apocalyptic number.

It is an amenable number.

203185980172 is an abundant number, since it is smaller than the sum of its proper divisors (205743427316).

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

203185980172 is a wasteful number, since it uses less digits than its factorization.

203185980172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13366 (or 13364 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 203185980172 in words is "two hundred three billion, one hundred eighty-five million, nine hundred eighty thousand, one hundred seventy-two".