20423003 has 4 divisors (see below), whose sum is σ = 20610480. Its totient is φ = 20235528.

The previous prime is 20422993. The next prime is 20423023. The reversal of 20423003 is 30032402.

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 20423003 - 2⁶ = 20422939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423023) 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, 93575 + ... + 93792.

It is an arithmetic number, because the mean of its divisors is an integer number (5152620).

Almost surely, 2^20423003 is an apocalyptic number.

20423003 is a deficient number, since it is larger than the sum of its proper divisors (187477).

20423003 is a wasteful number, since it uses less digits than its factorization.

20423003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187476.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20423003 is about 4519.1816737104. The cubic root of 20423003 is about 273.3421044512.

Adding to 20423003 its reverse (30032402), we get a palindrome (50455405).

The spelling of 20423003 in words is "twenty million, four hundred twenty-three thousand, three".