20503023 has 8 divisors (see below), whose sum is σ = 27409200. Its totient is φ = 13632768.

The previous prime is 20503013. The next prime is 20503027. The reversal of 20503023 is 32030502.

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

It is not a de Polignac number, because 20503023 - 2⁵ = 20502991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20502993 and 20503011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503027) 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, 7618 + ... + 9951.

It is an arithmetic number, because the mean of its divisors is an integer number (3426150).

Almost surely, 2^20503023 is an apocalyptic number.

20503023 is a deficient number, since it is larger than the sum of its proper divisors (6906177).

20503023 is a wasteful number, since it uses less digits than its factorization.

20503023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17961.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 20503023 is about 4528.0263912658. The cubic root of 20503023 is about 273.6986359293.

Adding to 20503023 its reverse (32030502), we get a palindrome (52533525).

The spelling of 20503023 in words is "twenty million, five hundred three thousand, twenty-three".