18244019 has 2 divisors, whose sum is σ = 18244020. Its totient is φ = 18244018.

The previous prime is 18244013. The next prime is 18244049. The reversal of 18244019 is 91044281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18244019 - 2²⁰ = 17195443 is a prime.

It is a super-2 number, since 2×18244019² = 665688458544722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18243982 and 18244000.

It is not a weakly prime, because it can be changed into another prime (18244013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9122009 + 9122010.

It is an arithmetic number, because the mean of its divisors is an integer number (9122010).

Almost surely, 2^18244019 is an apocalyptic number.

18244019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18244019 is an equidigital number, since it uses as much as digits as its factorization.

18244019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 18244019 is about 4271.3017921940. The cubic root of 18244019 is about 263.2531068254.

The spelling of 18244019 in words is "eighteen million, two hundred forty-four thousand, nineteen".