18742108 has 36 divisors (see below), whose sum is σ = 41626872. Its totient is φ = 7301280.

The previous prime is 18742099. The next prime is 18742121. The reversal of 18742108 is 80124781.

It is a super-2 number, since 2×18742108² = 702533224567328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18742108.

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, 2191 + ... + 6502.

It is an arithmetic number, because the mean of its divisors is an integer number (1156302).

Almost surely, 2^18742108 is an apocalyptic number.

It is an amenable number.

18742108 is an abundant number, since it is smaller than the sum of its proper divisors (22884764).

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

18742108 is a wasteful number, since it uses less digits than its factorization.

18742108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722 (or 8713 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18742108 is about 4329.2156333451. The cubic root of 18742108 is about 265.6273637252.

Adding to 18742108 its reverse (80124781), we get a palindrome (98866889).

The spelling of 18742108 in words is "eighteen million, seven hundred forty-two thousand, one hundred eight".