18518046 has 16 divisors (see below), whose sum is σ = 38985600. Its totient is φ = 5847768.

The previous prime is 18518039. The next prime is 18518051. The reversal of 18518046 is 64081581.

It is a junction number, because it is equal to n+sod(n) for n = 18517998 and 18518016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81106 + ... + 81333.

It is an arithmetic number, because the mean of its divisors is an integer number (2436600).

Almost surely, 2^18518046 is an apocalyptic number.

18518046 is an abundant number, since it is smaller than the sum of its proper divisors (20467554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18518046 is a wasteful number, since it uses less digits than its factorization.

18518046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162463.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 18518046 is about 4303.2599270785. The cubic root of 18518046 is about 264.5645917464.

The spelling of 18518046 in words is "eighteen million, five hundred eighteen thousand, forty-six".