18049770 has 32 divisors (see below), whose sum is σ = 48133440. Its totient is φ = 4813200.

The previous prime is 18049769. The next prime is 18049783. The reversal of 18049770 is 7794081.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 33156 + ... + 33695.

It is an arithmetic number, because the mean of its divisors is an integer number (1504170).

Almost surely, 2^18049770 is an apocalyptic number.

18049770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18049770 is an abundant number, since it is smaller than the sum of its proper divisors (30083670).

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

18049770 is a wasteful number, since it uses less digits than its factorization.

18049770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66867 (or 66861 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18049770 is about 4248.5020889721. The cubic root of 18049770 is about 262.3154621368.

The spelling of 18049770 in words is "eighteen million, forty-nine thousand, seven hundred seventy".