20799111 has 8 divisors (see below), whose sum is σ = 27771120. Its totient is φ = 13846592.

The previous prime is 20799101. The next prime is 20799127. The reversal of 20799111 is 11199702.

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 20799111 - 2²² = 16604807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799101) 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, 2166 + ... + 6803.

It is an arithmetic number, because the mean of its divisors is an integer number (3471390).

Almost surely, 2^20799111 is an apocalyptic number.

20799111 is a deficient number, since it is larger than the sum of its proper divisors (6972009).

20799111 is an equidigital number, since it uses as much as digits as its factorization.

20799111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9745.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 20799111 is about 4560.6042362827. The cubic root of 20799111 is about 275.0098552942.

It can be divided in two parts, 20799 and 111, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20799111 in words is "twenty million, seven hundred ninety-nine thousand, one hundred eleven".