18216770 has 32 divisors (see below), whose sum is σ = 38525760. Its totient is φ = 6114240.

The previous prime is 18216769. The next prime is 18216773. The reversal of 18216770 is 7761281.

It is not an unprimeable number, because it can be changed into a prime (18216773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4940 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (1203930).

Almost surely, 2^18216770 is an apocalyptic number.

18216770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18216770 is an abundant number, since it is smaller than the sum of its proper divisors (20308990).

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

18216770 is a wasteful number, since it uses less digits than its factorization.

18216770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12770.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 18216770 is about 4268.1108233034. The cubic root of 18216770 is about 263.1219778560.

The spelling of 18216770 in words is "eighteen million, two hundred sixteen thousand, seven hundred seventy".