18693373 has 2 divisors, whose sum is σ = 18693374. Its totient is φ = 18693372.

The previous prime is 18693331. The next prime is 18693413. The reversal of 18693373 is 37339681.

It is an a-pointer prime, because the next prime (18693413) can be obtained adding 18693373 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 13689 = 4322^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 18693373 - 2¹³ = 18685181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18693673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9346686 + 9346687.

It is an arithmetic number, because the mean of its divisors is an integer number (9346687).

Almost surely, 2^18693373 is an apocalyptic number.

It is an amenable number.

18693373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18693373 is an equidigital number, since it uses as much as digits as its factorization.

18693373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 18693373 is about 4323.5833518044. The cubic root of 18693373 is about 265.3969274196.

The spelling of 18693373 in words is "eighteen million, six hundred ninety-three thousand, three hundred seventy-three".