18396653 has 4 divisors (see below), whose sum is σ = 20069088. Its totient is φ = 16724220.

The previous prime is 18396629. The next prime is 18396661. The reversal of 18396653 is 35669381.

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.

It is a cyclic number.

It is not a de Polignac number, because 18396653 - 2¹⁴ = 18380269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18396653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18396683) 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, 836201 + ... + 836222.

It is an arithmetic number, because the mean of its divisors is an integer number (5017272).

Almost surely, 2^18396653 is an apocalyptic number.

It is an amenable number.

18396653 is a deficient number, since it is larger than the sum of its proper divisors (1672435).

18396653 is a wasteful number, since it uses less digits than its factorization.

18396653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672434.

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

The square root of 18396653 is about 4289.1319634630. The cubic root of 18396653 is about 263.9852159229.

The spelling of 18396653 in words is "eighteen million, three hundred ninety-six thousand, six hundred fifty-three".