18050881 has 2 divisors, whose sum is σ = 18050882. Its totient is φ = 18050880.

The previous prime is 18050869. The next prime is 18050911. The reversal of 18050881 is 18805081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 410881 = 4200^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 18050881 - 2⁵ = 18050849 is a prime.

It is a super-2 number, since 2×18050881² = 651668609752322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18050801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025440 + 9025441.

It is an arithmetic number, because the mean of its divisors is an integer number (9025441).

Almost surely, 2^18050881 is an apocalyptic number.

It is an amenable number.

18050881 is a deficient number, since it is larger than the sum of its proper divisors (1).

18050881 is an equidigital number, since it uses as much as digits as its factorization.

18050881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 18050881 is about 4248.6328389260. The cubic root of 18050881 is about 262.3208440428.

The spelling of 18050881 in words is "eighteen million, fifty thousand, eight hundred eighty-one".