18892481 has 2 divisors, whose sum is σ = 18892482. Its totient is φ = 18892480.

The previous prime is 18892477. The next prime is 18892483. The reversal of 18892481 is 18429881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 13456 = 4345^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 18892481 - 2² = 18892477 is a prime.

It is a super-2 number, since 2×18892481² = 713851676670722, which contains 22 as substring.

Together with 18892483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18892483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9446240 + 9446241.

It is an arithmetic number, because the mean of its divisors is an integer number (9446241).

Almost surely, 2^18892481 is an apocalyptic number.

It is an amenable number.

18892481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18892481 is an equidigital number, since it uses as much as digits as its factorization.

18892481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 41.

The square root of 18892481 is about 4346.5481706752. The cubic root of 18892481 is about 266.3358722915.

The spelling of 18892481 in words is "eighteen million, eight hundred ninety-two thousand, four hundred eighty-one".