18309064 has 8 divisors (see below), whose sum is σ = 34329510. Its totient is φ = 9154528.

The previous prime is 18309061. The next prime is 18309077. The reversal of 18309064 is 46090381.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 1020100 = 4158^2 + 1010^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18309061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144309 + ... + 1144324.

Almost surely, 2^18309064 is an apocalyptic number.

It is an amenable number.

18309064 is a deficient number, since it is larger than the sum of its proper divisors (16020446).

18309064 is a wasteful number, since it uses less digits than its factorization.

18309064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288639 (or 2288635 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18309064 is about 4278.9092067956. The cubic root of 18309064 is about 263.5655925917.

The spelling of 18309064 in words is "eighteen million, three hundred nine thousand, sixty-four".