18402942 has 24 divisors (see below), whose sum is σ = 39101976. Its totient is φ = 5772928.

The previous prime is 18402941. The next prime is 18402947. The reversal of 18402942 is 24920481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18402941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3573 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (1629249).

Almost surely, 2^18402942 is an apocalyptic number.

18402942 is an abundant number, since it is smaller than the sum of its proper divisors (20699034).

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

18402942 is a wasteful number, since it uses less digits than its factorization.

18402942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10652 (or 10635 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18402942 is about 4289.8650328419. The cubic root of 18402942 is about 264.0152941094.

The spelling of 18402942 in words is "eighteen million, four hundred two thousand, nine hundred forty-two".