18802481 has 6 divisors (see below), whose sum is σ = 19251810. Its totient is φ = 18363408.

The previous prime is 18802451. The next prime is 18802499. The reversal of 18802481 is 18420881.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 312481 = 4300^2 + 559^2 .

It is not a de Polignac number, because 18802481 - 2⁶ = 18802417 is a prime.

It is a super-2 number, since 2×18802481² = 707066583510722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18802451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3236 + ... + 6933.

It is an arithmetic number, because the mean of its divisors is an integer number (3208635).

Almost surely, 2^18802481 is an apocalyptic number.

It is an amenable number.

18802481 is a deficient number, since it is larger than the sum of its proper divisors (449329).

18802481 is an equidigital number, since it uses as much as digits as its factorization.

18802481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255 (or 10212 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 18802481 is about 4336.1827682883. The cubic root of 18802481 is about 265.9122753292.

The spelling of 18802481 in words is "eighteen million, eight hundred two thousand, four hundred eighty-one".