18326537 has 2 divisors, whose sum is σ = 18326538. Its totient is φ = 18326536.

The previous prime is 18326531. The next prime is 18326543. The reversal of 18326537 is 73562381.

It is a balanced prime because it is at equal distance from previous prime (18326531) and next prime (18326543).

It can be written as a sum of positive squares in only one way, i.e., 17397241 + 929296 = 4171^2 + 964^2 .

It is an emirp because it is prime and its reverse (73562381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18326537 - 2¹⁰ = 18325513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18326497 and 18326506.

It is not a weakly prime, because it can be changed into another prime (18326531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9163268 + 9163269.

It is an arithmetic number, because the mean of its divisors is an integer number (9163269).

Almost surely, 2^18326537 is an apocalyptic number.

It is an amenable number.

18326537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18326537 is an equidigital number, since it uses as much as digits as its factorization.

18326537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 18326537 is about 4280.9504785737. The cubic root of 18326537 is about 263.6494093173.

The spelling of 18326537 in words is "eighteen million, three hundred twenty-six thousand, five hundred thirty-seven".