18488506 has 8 divisors (see below), whose sum is σ = 27803124. Its totient is φ = 9220800.

The previous prime is 18488497. The next prime is 18488521. The reversal of 18488506 is 60588481.

It can be written as a sum of positive squares in 2 ways, for example, as 14508481 + 3980025 = 3809^2 + 1995^2 .

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

It is a super-2 number, since 2×18488506² = 683649708224072, 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, 10725 + ... + 12328.

Almost surely, 2^18488506 is an apocalyptic number.

18488506 is a deficient number, since it is larger than the sum of its proper divisors (9314618).

18488506 is a wasteful number, since it uses less digits than its factorization.

18488506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23456.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 18488506 is about 4299.8262755604. The cubic root of 18488506 is about 264.4238390026.

The spelling of 18488506 in words is "eighteen million, four hundred eighty-eight thousand, five hundred six".