20743023 has 24 divisors (see below), whose sum is σ = 32630448. Its totient is φ = 11684736.

The previous prime is 20743013. The next prime is 20743031. The reversal of 20743023 is 32034702.

It is a happy number.

It is not a de Polignac number, because 20743023 - 2¹⁷ = 20611951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20743013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9765 + ... + 11697.

It is an arithmetic number, because the mean of its divisors is an integer number (1359602).

Almost surely, 2^20743023 is an apocalyptic number.

20743023 is a deficient number, since it is larger than the sum of its proper divisors (11887425).

20743023 is a wasteful number, since it uses less digits than its factorization.

20743023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 20743023 is about 4554.4508999439. The cubic root of 20743023 is about 274.7624306383.

Adding to 20743023 its reverse (32034702), we get a palindrome (52777725).

The spelling of 20743023 in words is "twenty million, seven hundred forty-three thousand, twenty-three".