18353957 has 2 divisors, whose sum is σ = 18353958. Its totient is φ = 18353956.

The previous prime is 18353947. The next prime is 18353971. The reversal of 18353957 is 75935381.

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., 14853316 + 3500641 = 3854^2 + 1871^2 .

It is a cyclic number.

It is not a de Polignac number, because 18353957 - 2¹⁸ = 18091813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18353927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9176978 + 9176979.

It is an arithmetic number, because the mean of its divisors is an integer number (9176979).

Almost surely, 2^18353957 is an apocalyptic number.

It is an amenable number.

18353957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18353957 is an equidigital number, since it uses as much as digits as its factorization.

18353957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 18353957 is about 4284.1518413800. The cubic root of 18353957 is about 263.7808337529.

The spelling of 18353957 in words is "eighteen million, three hundred fifty-three thousand, nine hundred fifty-seven".