20684793 has 8 divisors (see below), whose sum is σ = 27619456. Its totient is φ = 13770000.

The previous prime is 20684791. The next prime is 20684809. The reversal of 20684793 is 39748602.

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

It is not a de Polignac number, because 20684793 - 2¹ = 20684791 is a prime.

It is a super-2 number, since 2×20684793² = 855721322905698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20684791) 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, 2338 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (3452432).

Almost surely, 2^20684793 is an apocalyptic number.

It is an amenable number.

20684793 is a deficient number, since it is larger than the sum of its proper divisors (6934663).

20684793 is an equidigital number, since it uses as much as digits as its factorization.

20684793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20684793 is about 4548.0537595767. The cubic root of 20684793 is about 274.5050844941.

The spelling of 20684793 in words is "twenty million, six hundred eighty-four thousand, seven hundred ninety-three".