20745293 has 8 divisors (see below), whose sum is σ = 21638400. Its totient is φ = 19866240.

The previous prime is 20745289. The next prime is 20745301. The reversal of 20745293 is 39254702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20745293 - 2² = 20745289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20745203) 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, 443 + ... + 6456.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^20745293 is an apocalyptic number.

It is an amenable number.

20745293 is a deficient number, since it is larger than the sum of its proper divisors (893107).

20745293 is an equidigital number, since it uses as much as digits as its factorization.

20745293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20745293 is about 4554.7000998968. The cubic root of 20745293 is about 274.7724530921.

Adding to 20745293 its reverse (39254702), we get a palindrome (59999995).

The spelling of 20745293 in words is "twenty million, seven hundred forty-five thousand, two hundred ninety-three".