20679393 has 8 divisors (see below), whose sum is σ = 31511488. Its totient is φ = 11816784.

The previous prime is 20679383. The next prime is 20679397. The reversal of 20679393 is 39397602.

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

It is not a de Polignac number, because 20679393 - 2¹⁴ = 20663009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20679397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492346 + ... + 492387.

It is an arithmetic number, because the mean of its divisors is an integer number (3938936).

Almost surely, 2^20679393 is an apocalyptic number.

It is an amenable number.

20679393 is a deficient number, since it is larger than the sum of its proper divisors (10832095).

20679393 is an equidigital number, since it uses as much as digits as its factorization.

20679393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984743.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 20679393 is about 4547.4600602974. The cubic root of 20679393 is about 274.4811948591.

The spelling of 20679393 in words is "twenty million, six hundred seventy-nine thousand, three hundred ninety-three".