18706951 has 2 divisors, whose sum is σ = 18706952. Its totient is φ = 18706950.

The previous prime is 18706913. The next prime is 18706967. The reversal of 18706951 is 15960781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18706951 - 2⁹ = 18706439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18706951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18706901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9353475 + 9353476.

It is an arithmetic number, because the mean of its divisors is an integer number (9353476).

Almost surely, 2^18706951 is an apocalyptic number.

18706951 is a deficient number, since it is larger than the sum of its proper divisors (1).

18706951 is an equidigital number, since it uses as much as digits as its factorization.

18706951 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 18706951 is about 4325.1532920811. The cubic root of 18706951 is about 265.4611692117.

The spelling of 18706951 in words is "eighteen million, seven hundred six thousand, nine hundred fifty-one".