18374390 has 16 divisors (see below), whose sum is σ = 33131808. Its totient is φ = 7336896.

The previous prime is 18374383. The next prime is 18374393. The reversal of 18374390 is 9347381.

It is a self number, because there is not a number n which added to its sum of digits gives 18374390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18374393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6194 + ... + 8666.

It is an arithmetic number, because the mean of its divisors is an integer number (2070738).

Almost surely, 2^18374390 is an apocalyptic number.

18374390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18374390 is a deficient number, since it is larger than the sum of its proper divisors (14757418).

18374390 is a wasteful number, since it uses less digits than its factorization.

18374390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 18374390 is about 4286.5358974351. The cubic root of 18374390 is about 263.8786843125.

The spelling of 18374390 in words is "eighteen million, three hundred seventy-four thousand, three hundred ninety".