20914793 has 4 divisors (see below), whose sum is σ = 20952900. Its totient is φ = 20876688.

The previous prime is 20914783. The next prime is 20914837. The reversal of 20914793 is 39741902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39741902 = 2 ⋅19870951.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 17197609 = 1928^2 + 4147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20914793 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 (20914753) 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 3 ways as a sum of consecutive naturals, for example, 18218 + ... + 19331.

It is an arithmetic number, because the mean of its divisors is an integer number (5238225).

Almost surely, 2^20914793 is an apocalyptic number.

It is an amenable number.

20914793 is a deficient number, since it is larger than the sum of its proper divisors (38107).

20914793 is an equidigital number, since it uses as much as digits as its factorization.

20914793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38106.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20914793 is about 4573.2693994559. The cubic root of 20914793 is about 275.5187695202.

The spelling of 20914793 in words is "twenty million, nine hundred fourteen thousand, seven hundred ninety-three".