20745793 has 6 divisors (see below), whose sum is σ = 21687554. Its totient is φ = 19843296.

The previous prime is 20745787. The next prime is 20745799. The reversal of 20745793 is 39754702.

It is an interprime number because it is at equal distance from previous prime (20745787) and next prime (20745799).

It can be written as a sum of positive squares in only one way, i.e., 14227984 + 6517809 = 3772^2 + 2553^2 .

It is not a de Polignac number, because 20745793 - 2⁵ = 20745761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20745799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19080 + ... + 20137.

Almost surely, 2^20745793 is an apocalyptic number.

20745793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20745793 is a deficient number, since it is larger than the sum of its proper divisors (941761).

20745793 is an equidigital number, since it uses as much as digits as its factorization.

20745793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39263 (or 39240 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 20745793 is about 4554.7549879220. The cubic root of 20745793 is about 274.7746605828.

The spelling of 20745793 in words is "twenty million, seven hundred forty-five thousand, seven hundred ninety-three".