18106787 has 2 divisors, whose sum is σ = 18106788. Its totient is φ = 18106786.

The previous prime is 18106763. The next prime is 18106831. The reversal of 18106787 is 78760181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18106787 - 2⁸ = 18106531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18106787.

It is not a weakly prime, because it can be changed into another prime (18106757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053393 + 9053394.

It is an arithmetic number, because the mean of its divisors is an integer number (9053394).

Almost surely, 2^18106787 is an apocalyptic number.

18106787 is a deficient number, since it is larger than the sum of its proper divisors (1).

18106787 is an equidigital number, since it uses as much as digits as its factorization.

18106787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 18106787 is about 4255.2070454914. The cubic root of 18106787 is about 262.5913792217.

The spelling of 18106787 in words is "eighteen million, one hundred six thousand, seven hundred eighty-seven".