20699313 has 8 divisors (see below), whose sum is σ = 28051776. Its totient is φ = 13573200.

The previous prime is 20699299. The next prime is 20699339. The reversal of 20699313 is 31399602.

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

It is not a de Polignac number, because 20699313 - 2⁹ = 20698801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20699363) 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, 56373 + ... + 56738.

It is an arithmetic number, because the mean of its divisors is an integer number (3506472).

Almost surely, 2^20699313 is an apocalyptic number.

It is an amenable number.

20699313 is a deficient number, since it is larger than the sum of its proper divisors (7352463).

20699313 is a wasteful number, since it uses less digits than its factorization.

20699313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113175.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 20699313 is about 4549.6497667403. The cubic root of 20699313 is about 274.5693004547.

It can be divided in two parts, 20699 and 313, that added together give a palindrome (21012).

The spelling of 20699313 in words is "twenty million, six hundred ninety-nine thousand, three hundred thirteen".