18697051 has 2 divisors, whose sum is σ = 18697052. Its totient is φ = 18697050.

The previous prime is 18697043. The next prime is 18697057. The reversal of 18697051 is 15079681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18697051 - 2³ = 18697043 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18697051.

It is not a weakly prime, because it can be changed into another prime (18697057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9348525 + 9348526.

It is an arithmetic number, because the mean of its divisors is an integer number (9348526).

Almost surely, 2^18697051 is an apocalyptic number.

18697051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18697051 is an equidigital number, since it uses as much as digits as its factorization.

18697051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 18697051 is about 4324.0086725167. The cubic root of 18697051 is about 265.4143322665.

The spelling of 18697051 in words is "eighteen million, six hundred ninety-seven thousand, fifty-one".