20023404213 has 4 divisors (see below), whose sum is σ = 26697872288. Its totient is φ = 13348936140.

The previous prime is 20023404157. The next prime is 20023404251. The reversal of 20023404213 is 31240432002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20023404213 - 2²⁰ = 20022355637 is a prime.

It is a super-2 number, since 2×20023404213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20023404213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023404263) 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, 3337234033 + ... + 3337234038.

It is an arithmetic number, because the mean of its divisors is an integer number (6674468072).

Almost surely, 2^20023404213 is an apocalyptic number.

It is an amenable number.

20023404213 is a deficient number, since it is larger than the sum of its proper divisors (6674468075).

20023404213 is an equidigital number, since it uses as much as digits as its factorization.

20023404213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674468074.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20023404213 its reverse (31240432002), we get a palindrome (51263836215).

The spelling of 20023404213 in words is "twenty billion, twenty-three million, four hundred four thousand, two hundred thirteen".