20799313 has 4 divisors (see below), whose sum is σ = 22022820. Its totient is φ = 19575808.

The previous prime is 20799307. The next prime is 20799323. The reversal of 20799313 is 31399702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10093329 + 10705984 = 3177^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 20799313 - 2²¹ = 18702161 is a prime.

It is a super-2 number, since 2×20799313² = 865222842543938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20799323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611728 + ... + 611761.

It is an arithmetic number, because the mean of its divisors is an integer number (5505705).

Almost surely, 2^20799313 is an apocalyptic number.

It is an amenable number.

20799313 is a deficient number, since it is larger than the sum of its proper divisors (1223507).

20799313 is a wasteful number, since it uses less digits than its factorization.

20799313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223506.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 20799313 is about 4560.6263824172. The cubic root of 20799313 is about 275.0107455856.

It can be divided in two parts, 20799 and 313, that added together give a palindrome (21112).

The spelling of 20799313 in words is "twenty million, seven hundred ninety-nine thousand, three hundred thirteen".