18790668 has 36 divisors (see below), whose sum is σ = 51153648. Its totient is φ = 5781600.

The previous prime is 18790663. The next prime is 18790721. The reversal of 18790668 is 86609781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (18790663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19608 + ... + 20543.

Almost surely, 2^18790668 is an apocalyptic number.

18790668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18790668 is an abundant number, since it is smaller than the sum of its proper divisors (32362980).

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

18790668 is a wasteful number, since it uses less digits than its factorization.

18790668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40174 (or 40169 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18790668 is about 4334.8204115050. The cubic root of 18790668 is about 265.8565755914.

The spelling of 18790668 in words is "eighteen million, seven hundred ninety thousand, six hundred sixty-eight".