18450539 has 16 divisors (see below), whose sum is σ = 20064000. Its totient is φ = 16912800.

The previous prime is 18450479. The next prime is 18450541. The reversal of 18450539 is 93505481.

It is a cyclic number.

It is not a de Polignac number, because 18450539 - 2²⁰ = 17401963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18450499 and 18450508.

It is not an unprimeable number, because it can be changed into a prime (18450599) 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 in 15 ways as a sum of consecutive naturals, for example, 122114 + ... + 122264.

It is an arithmetic number, because the mean of its divisors is an integer number (1254000).

Almost surely, 2^18450539 is an apocalyptic number.

18450539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18450539 is a deficient number, since it is larger than the sum of its proper divisors (1613461).

18450539 is a wasteful number, since it uses less digits than its factorization.

18450539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 18450539 is about 4295.4090608462. The cubic root of 18450539 is about 264.2427127783.

The spelling of 18450539 in words is "eighteen million, four hundred fifty thousand, five hundred thirty-nine".