20801379 has 16 divisors (see below), whose sum is σ = 28651392. Its totient is φ = 13415808.

The previous prime is 20801317. The next prime is 20801383. The reversal of 20801379 is 97310802.

It is a happy number.

It is not a de Polignac number, because 20801379 - 2⁹ = 20800867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20801479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13864 + ... + 15290.

It is an arithmetic number, because the mean of its divisors is an integer number (1790712).

Almost surely, 2^20801379 is an apocalyptic number.

20801379 is a deficient number, since it is larger than the sum of its proper divisors (7850013).

20801379 is a wasteful number, since it uses less digits than its factorization.

20801379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20801379 is about 4560.8528807669. The cubic root of 20801379 is about 275.0198509086.

The spelling of 20801379 in words is "twenty million, eight hundred one thousand, three hundred seventy-nine".