18364047 has 24 divisors (see below), whose sum is σ = 27450000. Its totient is φ = 10902528.

The previous prime is 18364039. The next prime is 18364057. The reversal of 18364047 is 74046381.

It is not a de Polignac number, because 18364047 - 2³ = 18364039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18363999 and 18364017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14079 + ... + 15327.

It is an arithmetic number, because the mean of its divisors is an integer number (1143750).

Almost surely, 2^18364047 is an apocalyptic number.

18364047 is a deficient number, since it is larger than the sum of its proper divisors (9085953).

18364047 is a wasteful number, since it uses less digits than its factorization.

18364047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 18364047 is about 4285.3292755633. The cubic root of 18364047 is about 263.8291623147.

The spelling of 18364047 in words is "eighteen million, three hundred sixty-four thousand, forty-seven".