18859036 has 24 divisors (see below), whose sum is σ = 38936576. Its totient is φ = 7821360.

The previous prime is 18859033. The next prime is 18859037. The reversal of 18859036 is 63095881.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18859036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18859033) 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, 9996 + ... + 11731.

Almost surely, 2^18859036 is an apocalyptic number.

It is an amenable number.

18859036 is an abundant number, since it is smaller than the sum of its proper divisors (20077540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18859036 is a wasteful number, since it uses less digits than its factorization.

18859036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21769 (or 21767 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18859036 is about 4342.6991606603. The cubic root of 18859036 is about 266.1786163485.

The spelling of 18859036 in words is "eighteen million, eight hundred fifty-nine thousand, thirty-six".