18380707 has 2 divisors, whose sum is σ = 18380708. Its totient is φ = 18380706.

The previous prime is 18380701. The next prime is 18380729. The reversal of 18380707 is 70708381.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (70708381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18380707 - 2³ = 18380699 is a prime.

It is not a weakly prime, because it can be changed into another prime (18380701) 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, 9190353 + 9190354.

It is an arithmetic number, because the mean of its divisors is an integer number (9190354).

Almost surely, 2^18380707 is an apocalyptic number.

18380707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18380707 is an equidigital number, since it uses as much as digits as its factorization.

18380707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 18380707 is about 4287.2726761894. The cubic root of 18380707 is about 263.9089207931.

The spelling of 18380707 in words is "eighteen million, three hundred eighty thousand, seven hundred seven".