18265018 has 8 divisors (see below), whose sum is σ = 27420948. Its totient is φ = 9124704.

The previous prime is 18265001. The next prime is 18265031. The reversal of 18265018 is 81056281.

It can be written as a sum of positive squares in 2 ways, for example, as 16024009 + 2241009 = 4003^2 + 1497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18265018² = 667221765080648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 6052.

Almost surely, 2^18265018 is an apocalyptic number.

18265018 is a deficient number, since it is larger than the sum of its proper divisors (9155930).

18265018 is a wasteful number, since it uses less digits than its factorization.

18265018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 18265018 is about 4273.7592351465. The cubic root of 18265018 is about 263.3540701860.

The spelling of 18265018 in words is "eighteen million, two hundred sixty-five thousand, eighteen".