18913529 has 2 divisors, whose sum is σ = 18913530. Its totient is φ = 18913528.

The previous prime is 18913523. The next prime is 18913541. The reversal of 18913529 is 92531981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 6325225 = 3548^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 18913529 - 2⁸ = 18913273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18913492 and 18913501.

It is not a weakly prime, because it can be changed into another prime (18913523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9456764 + 9456765.

It is an arithmetic number, because the mean of its divisors is an integer number (9456765).

Almost surely, 2^18913529 is an apocalyptic number.

It is an amenable number.

18913529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18913529 is an equidigital number, since it uses as much as digits as its factorization.

18913529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 18913529 is about 4348.9687283309. The cubic root of 18913529 is about 266.4347433171.

The spelling of 18913529 in words is "eighteen million, nine hundred thirteen thousand, five hundred twenty-nine".