18373601 has 2 divisors, whose sum is σ = 18373602. Its totient is φ = 18373600.

The previous prime is 18373591. The next prime is 18373613. The reversal of 18373601 is 10637381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9759376 + 8614225 = 3124^2 + 2935^2 .

It is an emirp because it is prime and its reverse (10637381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18373601 - 2¹⁰ = 18372577 is a prime.

It is not a weakly prime, because it can be changed into another prime (18373631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9186800 + 9186801.

It is an arithmetic number, because the mean of its divisors is an integer number (9186801).

Almost surely, 2^18373601 is an apocalyptic number.

It is an amenable number.

18373601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18373601 is an equidigital number, since it uses as much as digits as its factorization.

18373601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 18373601 is about 4286.4438640906. The cubic root of 18373601 is about 263.8749072572.

The spelling of 18373601 in words is "eighteen million, three hundred seventy-three thousand, six hundred one".