18253957 has 2 divisors, whose sum is σ = 18253958. Its totient is φ = 18253956.

The previous prime is 18253943. The next prime is 18253993. The reversal of 18253957 is 75935281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 5764801 = 3534^2 + 2401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18253957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18250957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9126978 + 9126979.

It is an arithmetic number, because the mean of its divisors is an integer number (9126979).

Almost surely, 2^18253957 is an apocalyptic number.

It is an amenable number.

18253957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18253957 is an equidigital number, since it uses as much as digits as its factorization.

18253957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 18253957 is about 4272.4649793767. The cubic root of 18253957 is about 263.3008984602.

The spelling of 18253957 in words is "eighteen million, two hundred fifty-three thousand, nine hundred fifty-seven".