18019370 has 32 divisors (see below), whose sum is σ = 34407936. Its totient is φ = 6782400.

The previous prime is 18019357. The next prime is 18019387. The reversal of 18019370 is 7391081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10685 + ... + 12255.

It is an arithmetic number, because the mean of its divisors is an integer number (1075248).

Almost surely, 2^18019370 is an apocalyptic number.

18019370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18019370 is a deficient number, since it is larger than the sum of its proper divisors (16388566).

18019370 is a wasteful number, since it uses less digits than its factorization.

18019370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 18019370 is about 4244.9228497112. The cubic root of 18019370 is about 262.1681126848.

The spelling of 18019370 in words is "eighteen million, nineteen thousand, three hundred seventy".