18220967 has 2 divisors, whose sum is σ = 18220968. Its totient is φ = 18220966.

The previous prime is 18220927. The next prime is 18220973. The reversal of 18220967 is 76902281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18220967 - 2¹⁴ = 18204583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18220927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9110483 + 9110484.

It is an arithmetic number, because the mean of its divisors is an integer number (9110484).

Almost surely, 2^18220967 is an apocalyptic number.

18220967 is a deficient number, since it is larger than the sum of its proper divisors (1).

18220967 is an equidigital number, since it uses as much as digits as its factorization.

18220967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 18220967 is about 4268.6024645076. The cubic root of 18220967 is about 263.1421833799.

The spelling of 18220967 in words is "eighteen million, two hundred twenty thousand, nine hundred sixty-seven".