18117046 has 4 divisors (see below), whose sum is σ = 27175572. Its totient is φ = 9058522.

The previous prime is 18117041. The next prime is 18117101. The reversal of 18117046 is 64071181.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×18117046² = 656454711532232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18117041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4529260 + ... + 4529263.

It is an arithmetic number, because the mean of its divisors is an integer number (6793893).

Almost surely, 2^18117046 is an apocalyptic number.

18117046 is a deficient number, since it is larger than the sum of its proper divisors (9058526).

18117046 is an equidigital number, since it uses as much as digits as its factorization.

18117046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058525.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18117046 is about 4256.4123390480. The cubic root of 18117046 is about 262.6409631400.

The spelling of 18117046 in words is "eighteen million, one hundred seventeen thousand, forty-six".