20020459 has 4 divisors (see below), whose sum is σ = 20029816. Its totient is φ = 20011104.

The previous prime is 20020457. The next prime is 20020463. The reversal of 20020459 is 95402002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20020459 - 2¹ = 20020457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (5007454).

Almost surely, 2^20020459 is an apocalyptic number.

20020459 is a deficient number, since it is larger than the sum of its proper divisors (9357).

20020459 is an equidigital number, since it uses as much as digits as its factorization.

20020459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9356.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20020459 is about 4474.4227560659. The cubic root of 20020459 is about 271.5342872337.

The spelling of 20020459 in words is "twenty million, twenty thousand, four hundred fifty-nine".