18038651 has 2 divisors, whose sum is σ = 18038652. Its totient is φ = 18038650.

The previous prime is 18038597. The next prime is 18038659. The reversal of 18038651 is 15683081.

It is a strong prime.

It is an emirp because it is prime and its reverse (15683081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18038651 - 2¹⁰ = 18037627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18038659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019325 + 9019326.

It is an arithmetic number, because the mean of its divisors is an integer number (9019326).

Almost surely, 2^18038651 is an apocalyptic number.

18038651 is a deficient number, since it is larger than the sum of its proper divisors (1).

18038651 is an equidigital number, since it uses as much as digits as its factorization.

18038651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18038651 is about 4247.1933085274. The cubic root of 18038651 is about 262.2615873092.

The spelling of 18038651 in words is "eighteen million, thirty-eight thousand, six hundred fifty-one".