18426761 has 2 divisors, whose sum is σ = 18426762. Its totient is φ = 18426760.

The previous prime is 18426673. The next prime is 18426763. The reversal of 18426761 is 16762481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 65536 = 4285^2 + 256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18426761 is a prime.

It is a super-2 number, since 2×18426761² = 679091041902242, which contains 22 as substring.

Together with 18426763, 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 (18426763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213380 + 9213381.

It is an arithmetic number, because the mean of its divisors is an integer number (9213381).

Almost surely, 2^18426761 is an apocalyptic number.

It is an amenable number.

18426761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18426761 is an equidigital number, since it uses as much as digits as its factorization.

18426761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 18426761 is about 4292.6403296806. The cubic root of 18426761 is about 264.1291503455.

The spelling of 18426761 in words is "eighteen million, four hundred twenty-six thousand, seven hundred sixty-one".