18379633 has 2 divisors, whose sum is σ = 18379634. Its totient is φ = 18379632.

The previous prime is 18379589. The next prime is 18379661. The reversal of 18379633 is 33697381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 121104 = 4273^2 + 348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18379633 is a prime.

It is not a weakly prime, because it can be changed into another prime (18379663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9189816 + 9189817.

It is an arithmetic number, because the mean of its divisors is an integer number (9189817).

Almost surely, 2^18379633 is an apocalyptic number.

It is an amenable number.

18379633 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379633 is an equidigital number, since it uses as much as digits as its factorization.

18379633 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 18379633 is about 4287.1474199052. The cubic root of 18379633 is about 263.9037805537.

The spelling of 18379633 in words is "eighteen million, three hundred seventy-nine thousand, six hundred thirty-three".