18235645 has 16 divisors (see below), whose sum is σ = 23556528. Its totient is φ = 13501440.

The previous prime is 18235643. The next prime is 18235667. The reversal of 18235645 is 54653281.

It can be written as a sum of positive squares in 8 ways, for example, as 79524 + 18156121 = 282^2 + 4261^2 .

It is not a de Polignac number, because 18235645 - 2¹ = 18235643 is a prime.

It is a Duffinian number.

Its product of digits (28800) is a multiple of the sum of its prime divisors (3600).

It is a self number, because there is not a number n which added to its sum of digits gives 18235645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18235643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3427 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (1472283).

Almost surely, 2^18235645 is an apocalyptic number.

It is an amenable number.

18235645 is a deficient number, since it is larger than the sum of its proper divisors (5320883).

18235645 is a wasteful number, since it uses less digits than its factorization.

18235645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600.

The product of its digits is 28800, while the sum is 34.

The square root of 18235645 is about 4270.3214164744. The cubic root of 18235645 is about 263.2128229587.

The spelling of 18235645 in words is "eighteen million, two hundred thirty-five thousand, six hundred forty-five".