18268694 has 4 divisors (see below), whose sum is σ = 27403044. Its totient is φ = 9134346.

The previous prime is 18268687. The next prime is 18268697. The reversal of 18268694 is 49686281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49686281 = 53 ⋅937477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18268697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4567172 + ... + 4567175.

It is an arithmetic number, because the mean of its divisors is an integer number (6850761).

Almost surely, 2^18268694 is an apocalyptic number.

18268694 is a deficient number, since it is larger than the sum of its proper divisors (9134350).

18268694 is an equidigital number, since it uses as much as digits as its factorization.

18268694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134349.

The product of its digits is 165888, while the sum is 44.

The square root of 18268694 is about 4274.1892798518. The cubic root of 18268694 is about 263.3717364633.

The spelling of 18268694 in words is "eighteen million, two hundred sixty-eight thousand, six hundred ninety-four".