20802259 has 4 divisors (see below), whose sum is σ = 20812320. Its totient is φ = 20792200.

The previous prime is 20802233. The next prime is 20802269. The reversal of 20802259 is 95220802.

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 20802259 - 2¹⁵ = 20769491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20802269) 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, 667 + ... + 6484.

It is an arithmetic number, because the mean of its divisors is an integer number (5203080).

Almost surely, 2^20802259 is an apocalyptic number.

20802259 is a deficient number, since it is larger than the sum of its proper divisors (10061).

20802259 is an equidigital number, since it uses as much as digits as its factorization.

20802259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20802259 is about 4560.9493529308. The cubic root of 20802259 is about 275.0237290819.

The spelling of 20802259 in words is "twenty million, eight hundred two thousand, two hundred fifty-nine".