18364557 has 8 divisors (see below), whose sum is σ = 25550784. Its totient is φ = 11710688.

The previous prime is 18364547. The next prime is 18364559. The reversal of 18364557 is 75546381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18364557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133008 + ... + 133145.

It is an arithmetic number, because the mean of its divisors is an integer number (3193848).

Almost surely, 2^18364557 is an apocalyptic number.

It is an amenable number.

18364557 is a deficient number, since it is larger than the sum of its proper divisors (7186227).

18364557 is a wasteful number, since it uses less digits than its factorization.

18364557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266179.

The product of its digits is 100800, while the sum is 39.

The square root of 18364557 is about 4285.3887804959. The cubic root of 18364557 is about 263.8316046164.

The spelling of 18364557 in words is "eighteen million, three hundred sixty-four thousand, five hundred fifty-seven".