20799843 has 8 divisors (see below), whose sum is σ = 28939008. Its totient is φ = 13263624.

The previous prime is 20799829. The next prime is 20799847. The reversal of 20799843 is 34899702.

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

It is not a de Polignac number, because 20799843 - 2⁵ = 20799811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20799795 and 20799804.

It is not an unprimeable number, because it can be changed into a prime (20799847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150655 + ... + 150792.

It is an arithmetic number, because the mean of its divisors is an integer number (3617376).

Almost surely, 2^20799843 is an apocalyptic number.

20799843 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20799843 is a deficient number, since it is larger than the sum of its proper divisors (8139165).

20799843 is a wasteful number, since it uses less digits than its factorization.

20799843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301473.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 20799843 is about 4560.6844881004. The cubic root of 20799843 is about 275.0130814714.

The spelling of 20799843 in words is "twenty million, seven hundred ninety-nine thousand, eight hundred forty-three".