20020402023 has 4 divisors (see below), whose sum is σ = 26693869368. Its totient is φ = 13346934680.

The previous prime is 20020402021. The next prime is 20020402037. The reversal of 20020402023 is 32020402002.

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 20020402023 - 2¹ = 20020402021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020401993 and 20020402011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020402021) 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 3 ways as a sum of consecutive naturals, for example, 3336733668 + ... + 3336733673.

It is an arithmetic number, because the mean of its divisors is an integer number (6673467342).

Almost surely, 2^20020402023 is an apocalyptic number.

20020402023 is a deficient number, since it is larger than the sum of its proper divisors (6673467345).

20020402023 is an equidigital number, since it uses as much as digits as its factorization.

20020402023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673467344.

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20020402023 its reverse (32020402002), we get a palindrome (52040804025).

The spelling of 20020402023 in words is "twenty billion, twenty million, four hundred two thousand, twenty-three".