20305023 has 8 divisors (see below), whose sum is σ = 27444528. Its totient is φ = 13351104.

The previous prime is 20305013. The next prime is 20305039. The reversal of 20305023 is 32050302.

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

It is not a de Polignac number, because 20305023 - 2¹⁶ = 20239487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20304993 and 20305011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305003) 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, 46140 + ... + 46577.

It is an arithmetic number, because the mean of its divisors is an integer number (3430566).

Almost surely, 2^20305023 is an apocalyptic number.

20305023 is a deficient number, since it is larger than the sum of its proper divisors (7139505).

20305023 is an equidigital number, since it uses as much as digits as its factorization.

20305023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92793.

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

The square root of 20305023 is about 4506.1095193082. The cubic root of 20305023 is about 272.8147383199.

Adding to 20305023 its reverse (32050302), we get a palindrome (52355325).

The spelling of 20305023 in words is "twenty million, three hundred five thousand, twenty-three".