18942492 has 24 divisors (see below), whose sum is σ = 45278352. Its totient is φ = 6160000.

The previous prime is 18942479. The next prime is 18942499. The reversal of 18942492 is 29424981.

It is a self number, because there is not a number n which added to its sum of digits gives 18942492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942499) 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, 18759 + ... + 19742.

It is an arithmetic number, because the mean of its divisors is an integer number (1886598).

Almost surely, 2^18942492 is an apocalyptic number.

18942492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18942492 is an abundant number, since it is smaller than the sum of its proper divisors (26335860).

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

18942492 is a wasteful number, since it uses less digits than its factorization.

18942492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38549 (or 38547 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 18942492 is about 4352.2973244024. The cubic root of 18942492 is about 266.5706744775.

The spelling of 18942492 in words is "eighteen million, nine hundred forty-two thousand, four hundred ninety-two".