18091010 has 16 divisors (see below), whose sum is σ = 37215936. Its totient is φ = 6202608.

The previous prime is 18090997. The next prime is 18091027. The reversal of 18091010 is 1019081.

It is a Curzon number.

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, 129152 + ... + 129291.

It is an arithmetic number, because the mean of its divisors is an integer number (2325996).

Almost surely, 2^18091010 is an apocalyptic number.

18091010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18091010 is an abundant number, since it is smaller than the sum of its proper divisors (19124926).

18091010 is a wasteful number, since it uses less digits than its factorization.

18091010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258457.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 18091010 is about 4253.3527951488. The cubic root of 18091010 is about 262.5150890797.

The spelling of 18091010 in words is "eighteen million, ninety-one thousand, ten".