20868807 has 8 divisors (see below), whose sum is σ = 27860976. Its totient is φ = 13894592.

The previous prime is 20868769. The next prime is 20868823. The reversal of 20868807 is 70886802.

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 20868807 - 2²³ = 12480199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20868847) 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, 1488 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (3482622).

Almost surely, 2^20868807 is an apocalyptic number.

20868807 is a deficient number, since it is larger than the sum of its proper divisors (6992169).

20868807 is an equidigital number, since it uses as much as digits as its factorization.

20868807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8977.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 20868807 is about 4568.2389385845. The cubic root of 20868807 is about 275.3166908053.

The spelling of 20868807 in words is "twenty million, eight hundred sixty-eight thousand, eight hundred seven".