18518072 has 8 divisors (see below), whose sum is σ = 34721400. Its totient is φ = 9259032.

The previous prime is 18518069. The next prime is 18518081. The reversal of 18518072 is 27081581.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157372 + ... + 1157387.

It is an arithmetic number, because the mean of its divisors is an integer number (4340175).

Almost surely, 2^18518072 is an apocalyptic number.

It is an amenable number.

18518072 is a deficient number, since it is larger than the sum of its proper divisors (16203328).

18518072 is a wasteful number, since it uses less digits than its factorization.

18518072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314765 (or 2314761 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 18518072 is about 4303.2629480430. The cubic root of 18518072 is about 264.5647155657.

The spelling of 18518072 in words is "eighteen million, five hundred eighteen thousand, seventy-two".