18134839 has 2 divisors, whose sum is σ = 18134840. Its totient is φ = 18134838.

The previous prime is 18134819. The next prime is 18134849. The reversal of 18134839 is 93843181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18134839 - 2⁵ = 18134807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18134798 and 18134807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18134819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9067419 + 9067420.

It is an arithmetic number, because the mean of its divisors is an integer number (9067420).

Almost surely, 2^18134839 is an apocalyptic number.

18134839 is a deficient number, since it is larger than the sum of its proper divisors (1).

18134839 is an equidigital number, since it uses as much as digits as its factorization.

18134839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 18134839 is about 4258.5019666545. The cubic root of 18134839 is about 262.7269161081.

The spelling of 18134839 in words is "eighteen million, one hundred thirty-four thousand, eight hundred thirty-nine".