18413537 has 2 divisors, whose sum is σ = 18413538. Its totient is φ = 18413536.

The previous prime is 18413513. The next prime is 18413561. The reversal of 18413537 is 73531481.

It is a balanced prime because it is at equal distance from previous prime (18413513) and next prime (18413561).

It can be written as a sum of positive squares in only one way, i.e., 9834496 + 8579041 = 3136^2 + 2929^2 .

It is an emirp because it is prime and its reverse (73531481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18413537 - 2⁸ = 18413281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18413137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206768 + 9206769.

It is an arithmetic number, because the mean of its divisors is an integer number (9206769).

Almost surely, 2^18413537 is an apocalyptic number.

It is an amenable number.

18413537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18413537 is an equidigital number, since it uses as much as digits as its factorization.

18413537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 18413537 is about 4291.0997424903. The cubic root of 18413537 is about 264.0659509627.

The spelling of 18413537 in words is "eighteen million, four hundred thirteen thousand, five hundred thirty-seven".