18250493 has 2 divisors, whose sum is σ = 18250494. Its totient is φ = 18250492.

The previous prime is 18250481. The next prime is 18250499. The reversal of 18250493 is 39405281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 85849 = 4262^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 18250493 - 2⁸ = 18250237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18250499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9125246 + 9125247.

It is an arithmetic number, because the mean of its divisors is an integer number (9125247).

Almost surely, 2^18250493 is an apocalyptic number.

It is an amenable number.

18250493 is a deficient number, since it is larger than the sum of its proper divisors (1).

18250493 is an equidigital number, since it uses as much as digits as its factorization.

18250493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18250493 is about 4272.0595735547. The cubic root of 18250493 is about 263.2842421263.

The spelling of 18250493 in words is "eighteen million, two hundred fifty thousand, four hundred ninety-three".