18036880 has 20 divisors (see below), whose sum is σ = 41935932. Its totient is φ = 7214720.

The previous prime is 18036877. The next prime is 18036923. The reversal of 18036880 is 8863081.

It can be written as a sum of positive squares in 2 ways, for example, as 4376464 + 13660416 = 2092^2 + 3696^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112651 + ... + 112810.

Almost surely, 2^18036880 is an apocalyptic number.

18036880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18036880 is an abundant number, since it is smaller than the sum of its proper divisors (23899052).

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

18036880 is a wasteful number, since it uses less digits than its factorization.

18036880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225474 (or 225468 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18036880 is about 4246.9848127819. The cubic root of 18036880 is about 262.2530042492.

The spelling of 18036880 in words is "eighteen million, thirty-six thousand, eight hundred eighty".