18641039 has 2 divisors, whose sum is σ = 18641040. Its totient is φ = 18641038.

The previous prime is 18641011. The next prime is 18641047. The reversal of 18641039 is 93014681.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18641039 - 2¹⁶ = 18575503 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18640996 and 18641014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18641069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9320519 + 9320520.

It is an arithmetic number, because the mean of its divisors is an integer number (9320520).

Almost surely, 2^18641039 is an apocalyptic number.

18641039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18641039 is an equidigital number, since it uses as much as digits as its factorization.

18641039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18641039 is about 4317.5269541718. The cubic root of 18641039 is about 265.1490273664.

The spelling of 18641039 in words is "eighteen million, six hundred forty-one thousand, thirty-nine".