20020023013 has 4 divisors (see below), whose sum is σ = 20024725708. Its totient is φ = 20015320320.

The previous prime is 20020022989. The next prime is 20020023041. The reversal of 20020023013 is 31032002002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31032002002 = 2 ⋅15516001001.

It can be written as a sum of positive squares in 2 ways, for example, as 13098115809 + 6921907204 = 114447^2 + 83198^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020023013 - 2⁹ = 20020022501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020022984 and 20020023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020023053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2344956 + ... + 2353477.

It is an arithmetic number, because the mean of its divisors is an integer number (5006181427).

Almost surely, 2^20020023013 is an apocalyptic number.

It is an amenable number.

20020023013 is a deficient number, since it is larger than the sum of its proper divisors (4702695).

20020023013 is an equidigital number, since it uses as much as digits as its factorization.

20020023013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702694.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20020023013 its reverse (31032002002), we get a palindrome (51052025015).

The spelling of 20020023013 in words is "twenty billion, twenty million, twenty-three thousand, thirteen".