18999007 has 2 divisors, whose sum is σ = 18999008. Its totient is φ = 18999006.

The previous prime is 18998983. The next prime is 18999017. The reversal of 18999007 is 70099981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18999007 - 2¹¹ = 18996959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18999017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9499503 + 9499504.

It is an arithmetic number, because the mean of its divisors is an integer number (9499504).

Almost surely, 2^18999007 is an apocalyptic number.

18999007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18999007 is an equidigital number, since it uses as much as digits as its factorization.

18999007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 18999007 is about 4358.7850371405. The cubic root of 18999007 is about 266.8355161547.

The spelling of 18999007 in words is "eighteen million, nine hundred ninety-nine thousand, seven".