18354829 has 2 divisors, whose sum is σ = 18354830. Its totient is φ = 18354828.

The previous prime is 18354827. The next prime is 18354857. The reversal of 18354829 is 92845381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17413929 + 940900 = 4173^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 18354829 - 2¹ = 18354827 is a prime.

Together with 18354827, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18354791 and 18354800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18354823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9177414 + 9177415.

It is an arithmetic number, because the mean of its divisors is an integer number (9177415).

Almost surely, 2^18354829 is an apocalyptic number.

It is an amenable number.

18354829 is a deficient number, since it is larger than the sum of its proper divisors (1).

18354829 is an equidigital number, since it uses as much as digits as its factorization.

18354829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 18354829 is about 4284.2536106071. The cubic root of 18354829 is about 263.7850111126.

The spelling of 18354829 in words is "eighteen million, three hundred fifty-four thousand, eight hundred twenty-nine".