18946880 has 28 divisors (see below), whose sum is σ = 45118020. Its totient is φ = 7578624.

The previous prime is 18946877. The next prime is 18946883. The reversal of 18946880 is 8864981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18946877) and next prime (18946883).

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 10137856 = 2968^2 + 3184^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18946883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29285 + ... + 29924.

Almost surely, 2^18946880 is an apocalyptic number.

18946880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18946880 is an abundant number, since it is smaller than the sum of its proper divisors (26171140).

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

18946880 is an equidigital number, since it uses as much as digits as its factorization.

18946880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59226 (or 59216 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18946880 is about 4352.8013968018. The cubic root of 18946880 is about 266.5912564547.

The spelling of 18946880 in words is "eighteen million, nine hundred forty-six thousand, eight hundred eighty".