20480459 has 4 divisors (see below), whose sum is σ = 20661816. Its totient is φ = 20299104.

The previous prime is 20480431. The next prime is 20480479. The reversal of 20480459 is 95408402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20480459 - 2¹⁶ = 20414923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20480479) 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 3 ways as a sum of consecutive naturals, for example, 90509 + ... + 90734.

It is an arithmetic number, because the mean of its divisors is an integer number (5165454).

Almost surely, 2^20480459 is an apocalyptic number.

20480459 is a deficient number, since it is larger than the sum of its proper divisors (181357).

20480459 is a wasteful number, since it uses less digits than its factorization.

20480459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181356.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20480459 is about 4525.5341121242. The cubic root of 20480459 is about 273.5981954086.

The spelling of 20480459 in words is "twenty million, four hundred eighty thousand, four hundred fifty-nine".