20799867 has 8 divisors (see below), whose sum is σ = 30254400. Its totient is φ = 12605960.

The previous prime is 20799847. The next prime is 20799869. The reversal of 20799867 is 76899702.

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 20799867 - 2⁷ = 20799739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20799869) 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, 315117 + ... + 315182.

It is an arithmetic number, because the mean of its divisors is an integer number (3781800).

Almost surely, 2^20799867 is an apocalyptic number.

20799867 is a deficient number, since it is larger than the sum of its proper divisors (9454533).

20799867 is a wasteful number, since it uses less digits than its factorization.

20799867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630313.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 20799867 is about 4560.6871192837. The cubic root of 20799867 is about 275.0131872464.

The spelling of 20799867 in words is "twenty million, seven hundred ninety-nine thousand, eight hundred sixty-seven".