20826879 has 4 divisors (see below), whose sum is σ = 27769176. Its totient is φ = 13884584.

The previous prime is 20826859. The next prime is 20826881. The reversal of 20826879 is 97862802.

It is a happy number.

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 20826879 - 2⁹ = 20826367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20826879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826809) 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, 3471144 + ... + 3471149.

It is an arithmetic number, because the mean of its divisors is an integer number (6942294).

Almost surely, 2^20826879 is an apocalyptic number.

20826879 is a deficient number, since it is larger than the sum of its proper divisors (6942297).

20826879 is an equidigital number, since it uses as much as digits as its factorization.

20826879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942296.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 20826879 is about 4563.6475543144. The cubic root of 20826879 is about 275.1321854874.

The spelling of 20826879 in words is "twenty million, eight hundred twenty-six thousand, eight hundred seventy-nine".