18974742 has 16 divisors (see below), whose sum is σ = 38666160. Its totient is φ = 6205472.

The previous prime is 18974741. The next prime is 18974743. The reversal of 18974742 is 24747981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18974741) and next prime (18974743).

It is a junction number, because it is equal to n+sod(n) for n = 18974694 and 18974703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974741) 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, 29517 + ... + 30152.

It is an arithmetic number, because the mean of its divisors is an integer number (2416635).

Almost surely, 2^18974742 is an apocalyptic number.

18974742 is an abundant number, since it is smaller than the sum of its proper divisors (19691418).

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

18974742 is a wasteful number, since it uses less digits than its factorization.

18974742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59727.

The product of its digits is 112896, while the sum is 42.

The square root of 18974742 is about 4356.0006887052. Note that the first 3 decimals coincide. The cubic root of 18974742 is about 266.7218694744.

The spelling of 18974742 in words is "eighteen million, nine hundred seventy-four thousand, seven hundred forty-two".