18536369 has 4 divisors (see below), whose sum is σ = 18678000. Its totient is φ = 18394740.

The previous prime is 18536363. The next prime is 18536389. The reversal of 18536369 is 96363581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96363581 = 83 ⋅1161007.

It is a cyclic number.

It is not a de Polignac number, because 18536369 - 2⁸ = 18536113 is a prime.

It is a super-2 number, since 2×18536369² = 687193951408322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18536363) 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, 70619 + ... + 70880.

It is an arithmetic number, because the mean of its divisors is an integer number (4669500).

Almost surely, 2^18536369 is an apocalyptic number.

It is an amenable number.

18536369 is a deficient number, since it is larger than the sum of its proper divisors (141631).

18536369 is a wasteful number, since it uses less digits than its factorization.

18536369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141630.

The product of its digits is 116640, while the sum is 41.

The square root of 18536369 is about 4305.3883680802. The cubic root of 18536369 is about 264.6518223149.

The spelling of 18536369 in words is "eighteen million, five hundred thirty-six thousand, three hundred sixty-nine".