18420708 has 24 divisors (see below), whose sum is σ = 43052800. Its totient is φ = 6130080.

The previous prime is 18420691. The next prime is 18420739. The reversal of 18420708 is 80702481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11118 + ... + 12666.

Almost surely, 2^18420708 is an apocalyptic number.

It is an amenable number.

18420708 is an abundant number, since it is smaller than the sum of its proper divisors (24632092).

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

18420708 is a wasteful number, since it uses less digits than its factorization.

18420708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547 (or 2545 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 18420708 is about 4291.9352278430. The cubic root of 18420708 is about 264.1002259487.

The spelling of 18420708 in words is "eighteen million, four hundred twenty thousand, seven hundred eight".