18715051 has 2 divisors, whose sum is σ = 18715052. Its totient is φ = 18715050.

The previous prime is 18715013. The next prime is 18715061. The reversal of 18715051 is 15051781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18715051 is a prime.

It is not a weakly prime, because it can be changed into another prime (18715061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9357525 + 9357526.

It is an arithmetic number, because the mean of its divisors is an integer number (9357526).

Almost surely, 2^18715051 is an apocalyptic number.

18715051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18715051 is an equidigital number, since it uses as much as digits as its factorization.

18715051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 18715051 is about 4326.0895737375. The cubic root of 18715051 is about 265.4994780592.

The spelling of 18715051 in words is "eighteen million, seven hundred fifteen thousand, fifty-one".