18230837 has 2 divisors, whose sum is σ = 18230838. Its totient is φ = 18230836.

The previous prime is 18230833. The next prime is 18230843. The reversal of 18230837 is 73803281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 329476 = 4231^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 18230837 - 2² = 18230833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18230833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115418 + 9115419.

It is an arithmetic number, because the mean of its divisors is an integer number (9115419).

Almost surely, 2^18230837 is an apocalyptic number.

It is an amenable number.

18230837 is a deficient number, since it is larger than the sum of its proper divisors (1).

18230837 is an equidigital number, since it uses as much as digits as its factorization.

18230837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18230837 is about 4269.7584240798. The cubic root of 18230837 is about 263.1896880766.

The spelling of 18230837 in words is "eighteen million, two hundred thirty thousand, eight hundred thirty-seven".