20465023 has 4 divisors (see below), whose sum is σ = 20500128. Its totient is φ = 20429920.

The previous prime is 20464987. The next prime is 20465041. The reversal of 20465023 is 32056402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20465023 - 2⁹ = 20464511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20464985 and 20465003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16663 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (5125032).

Almost surely, 2^20465023 is an apocalyptic number.

20465023 is a deficient number, since it is larger than the sum of its proper divisors (35105).

20465023 is an equidigital number, since it uses as much as digits as its factorization.

20465023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35104.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20465023 is about 4523.8283566024. The cubic root of 20465023 is about 273.5294416891.

The spelling of 20465023 in words is "twenty million, four hundred sixty-five thousand, twenty-three".