20870799 has 8 divisors (see below), whose sum is σ = 28047360. Its totient is φ = 13804056.

The previous prime is 20870791. The next prime is 20870813. The reversal of 20870799 is 99707802.

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

It is not a de Polignac number, because 20870799 - 2³ = 20870791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20870799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20870791) 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, 27009 + ... + 27770.

It is an arithmetic number, because the mean of its divisors is an integer number (3505920).

Almost surely, 2^20870799 is an apocalyptic number.

20870799 is a deficient number, since it is larger than the sum of its proper divisors (7176561).

20870799 is a wasteful number, since it uses less digits than its factorization.

20870799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54909.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 20870799 is about 4568.4569605065. The cubic root of 20870799 is about 275.3254505043.

The spelling of 20870799 in words is "twenty million, eight hundred seventy thousand, seven hundred ninety-nine".