20791393 has 8 divisors (see below), whose sum is σ = 23828288. Its totient is φ = 17771184.

The previous prime is 20791367. The next prime is 20791409. The reversal of 20791393 is 39319702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20791393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20791363) 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, 1371 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (2978536).

Almost surely, 2^20791393 is an apocalyptic number.

It is an amenable number.

20791393 is a deficient number, since it is larger than the sum of its proper divisors (3036895).

20791393 is an equidigital number, since it uses as much as digits as its factorization.

20791393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8343.

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

The square root of 20791393 is about 4559.7579979644. The cubic root of 20791393 is about 274.9758347912.

The spelling of 20791393 in words is "twenty million, seven hundred ninety-one thousand, three hundred ninety-three".