18253943 has 2 divisors, whose sum is σ = 18253944. Its totient is φ = 18253942.

The previous prime is 18253931. The next prime is 18253957. The reversal of 18253943 is 34935281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18253943 - 2⁸ = 18253687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18253993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9126971 + 9126972.

It is an arithmetic number, because the mean of its divisors is an integer number (9126972).

Almost surely, 2^18253943 is an apocalyptic number.

18253943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18253943 is an equidigital number, since it uses as much as digits as its factorization.

18253943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 18253943 is about 4272.4633409779. The cubic root of 18253943 is about 263.3008311467.

The spelling of 18253943 in words is "eighteen million, two hundred fifty-three thousand, nine hundred forty-three".