18472663 has 4 divisors (see below), whose sum is σ = 20152008. Its totient is φ = 16793320.

The previous prime is 18472661. The next prime is 18472667. The reversal of 18472663 is 36627481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18472663 - 2¹ = 18472661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18472661) 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, 839656 + ... + 839677.

It is an arithmetic number, because the mean of its divisors is an integer number (5038002).

Almost surely, 2^18472663 is an apocalyptic number.

18472663 is a deficient number, since it is larger than the sum of its proper divisors (1679345).

18472663 is a wasteful number, since it uses less digits than its factorization.

18472663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679344.

The product of its digits is 48384, while the sum is 37.

The square root of 18472663 is about 4297.9835969906. The cubic root of 18472663 is about 264.3482882062.

The spelling of 18472663 in words is "eighteen million, four hundred seventy-two thousand, six hundred sixty-three".