18940158 has 12 divisors (see below), whose sum is σ = 41037048. Its totient is φ = 6313380.

The previous prime is 18940157. The next prime is 18940183. The reversal of 18940158 is 85104981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 526098 + ... + 526133.

It is an arithmetic number, because the mean of its divisors is an integer number (3419754).

Almost surely, 2^18940158 is an apocalyptic number.

18940158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18940158 is an abundant number, since it is smaller than the sum of its proper divisors (22096890).

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

18940158 is a wasteful number, since it uses less digits than its factorization.

18940158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052239 (or 1052236 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18940158 is about 4352.0291818875. The cubic root of 18940158 is about 266.5597255220.

The spelling of 18940158 in words is "eighteen million, nine hundred forty thousand, one hundred fifty-eight".