20545023 has 8 divisors (see below), whose sum is σ = 28835200. Its totient is φ = 12975768.

The previous prime is 20545001. The next prime is 20545037. The reversal of 20545023 is 32054502.

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

It is not a de Polignac number, because 20545023 - 2⁵ = 20544991 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 (20545423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180163 + ... + 180276.

It is an arithmetic number, because the mean of its divisors is an integer number (3604400).

Almost surely, 2^20545023 is an apocalyptic number.

20545023 is a deficient number, since it is larger than the sum of its proper divisors (8290177).

20545023 is a wasteful number, since it uses less digits than its factorization.

20545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360461.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20545023 is about 4532.6618007524. The cubic root of 20545023 is about 273.8853970443.

Adding to 20545023 its reverse (32054502), we get a palindrome (52599525).

The spelling of 20545023 in words is "twenty million, five hundred forty-five thousand, twenty-three".