18424069 has 2 divisors, whose sum is σ = 18424070. Its totient is φ = 18424068.

The previous prime is 18424067. The next prime is 18424093. The reversal of 18424069 is 96042481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15499969 + 2924100 = 3937^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 18424069 - 2¹ = 18424067 is a prime.

It is a super-2 number, since 2×18424069² = 678892637033522, which contains 22 as substring.

Together with 18424067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18424067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9212034 + 9212035.

It is an arithmetic number, because the mean of its divisors is an integer number (9212035).

Almost surely, 2^18424069 is an apocalyptic number.

It is an amenable number.

18424069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18424069 is an equidigital number, since it uses as much as digits as its factorization.

18424069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 18424069 is about 4292.3267582979. The cubic root of 18424069 is about 264.1162873451.

The spelling of 18424069 in words is "eighteen million, four hundred twenty-four thousand, sixty-nine".