18055497 has 4 divisors (see below), whose sum is σ = 24074000. Its totient is φ = 12036996.

The previous prime is 18055493. The next prime is 18055507. The reversal of 18055497 is 79455081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18055497 - 2² = 18055493 is a prime.

It is a super-3 number, since 3×18055497³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18055493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3009247 + ... + 3009252.

It is an arithmetic number, because the mean of its divisors is an integer number (6018500).

Almost surely, 2^18055497 is an apocalyptic number.

It is an amenable number.

18055497 is a deficient number, since it is larger than the sum of its proper divisors (6018503).

18055497 is an equidigital number, since it uses as much as digits as its factorization.

18055497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018502.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 18055497 is about 4249.1760377749. The cubic root of 18055497 is about 262.3432025049.

The spelling of 18055497 in words is "eighteen million, fifty-five thousand, four hundred ninety-seven".