20879827 has 8 divisors (see below), whose sum is σ = 21422880. Its totient is φ = 20342400.

The previous prime is 20879821. The next prime is 20879863. The reversal of 20879827 is 72897802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20879827 - 2³ = 20879819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20879821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6699 + ... + 9307.

It is an arithmetic number, because the mean of its divisors is an integer number (2677860).

Almost surely, 2^20879827 is an apocalyptic number.

20879827 is a deficient number, since it is larger than the sum of its proper divisors (543053).

20879827 is a wasteful number, since it uses less digits than its factorization.

20879827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 20879827 is about 4569.4449334684. Note that the first 3 decimals coincide. The cubic root of 20879827 is about 275.3651435997.

The spelling of 20879827 in words is "twenty million, eight hundred seventy-nine thousand, eight hundred twenty-seven".