18940086 has 48 divisors (see below), whose sum is σ = 46725120. Its totient is φ = 5488560.

The previous prime is 18940079. The next prime is 18940127. The reversal of 18940086 is 68004981.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18940086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2475 + ... + 6633.

It is an arithmetic number, because the mean of its divisors is an integer number (973440).

Almost surely, 2^18940086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18940086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23362560).

18940086 is an abundant number, since it is smaller than the sum of its proper divisors (27785034).

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

18940086 is a wasteful number, since it uses less digits than its factorization.

18940086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18940086 is about 4352.0209098762. The cubic root of 18940086 is about 266.5593877507.

The spelling of 18940086 in words is "eighteen million, nine hundred forty thousand, eighty-six".