18743742 has 24 divisors (see below), whose sum is σ = 40926600. Its totient is φ = 6199440.

The previous prime is 18743737. The next prime is 18743771. The reversal of 18743742 is 24734781.

It is a happy number.

18743742 is a `hidden beast` number, since 187 + 437 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18743697 and 18743706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1617 + ... + 6332.

It is an arithmetic number, because the mean of its divisors is an integer number (1705275).

Almost surely, 2^18743742 is an apocalyptic number.

18743742 is an abundant number, since it is smaller than the sum of its proper divisors (22182858).

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

18743742 is a wasteful number, since it uses less digits than its factorization.

18743742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8088 (or 8085 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18743742 is about 4329.4043470205. The cubic root of 18743742 is about 265.6350829298.

The spelling of 18743742 in words is "eighteen million, seven hundred forty-three thousand, seven hundred forty-two".