18342690 has 32 divisors (see below), whose sum is σ = 44962560. Its totient is φ = 4786944.

The previous prime is 18342683. The next prime is 18342691. The reversal of 18342690 is 9624381.

It is a super-2 number, since 2×18342690² = 672908552872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18342691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (1405080).

Almost surely, 2^18342690 is an apocalyptic number.

18342690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18342690 is an abundant number, since it is smaller than the sum of its proper divisors (26619870).

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

18342690 is a wasteful number, since it uses less digits than its factorization.

18342690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13066.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 18342690 is about 4282.8366767833. The cubic root of 18342690 is about 263.7268467206.

The spelling of 18342690 in words is "eighteen million, three hundred forty-two thousand, six hundred ninety".