20723045 has 8 divisors (see below), whose sum is σ = 28420224. Its totient is φ = 14210064.

The previous prime is 20723041. The next prime is 20723047. The reversal of 20723045 is 54032702.

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 20723045 - 2² = 20723041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20723045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20723041) 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, 296009 + ... + 296078.

It is an arithmetic number, because the mean of its divisors is an integer number (3552528).

Almost surely, 2^20723045 is an apocalyptic number.

It is an amenable number.

20723045 is a deficient number, since it is larger than the sum of its proper divisors (7697179).

20723045 is an equidigital number, since it uses as much as digits as its factorization.

20723045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592099.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20723045 is about 4552.2571324564. The cubic root of 20723045 is about 274.6741926633.

Adding to 20723045 its reverse (54032702), we get a palindrome (74755747).

The spelling of 20723045 in words is "twenty million, seven hundred twenty-three thousand, forty-five".