18887022 has 48 divisors (see below), whose sum is σ = 51023232. Its totient is φ = 4905360.

The previous prime is 18887009. The next prime is 18887023. The reversal of 18887022 is 22078881.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5428 + ... + 8199.

It is an arithmetic number, because the mean of its divisors is an integer number (1062984).

Almost surely, 2^18887022 is an apocalyptic number.

18887022 is an abundant number, since it is smaller than the sum of its proper divisors (32136210).

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

18887022 is a wasteful number, since it uses less digits than its factorization.

18887022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13653 (or 13650 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 18887022 is about 4345.9201557323. The cubic root of 18887022 is about 266.3102171541.

The spelling of 18887022 in words is "eighteen million, eight hundred eighty-seven thousand, twenty-two".