20423213013 has 32 divisors (see below), whose sum is σ = 32142548992. Its totient is φ = 11287771200.

The previous prime is 20423213003. The next prime is 20423213033. The reversal of 20423213013 is 31031232402.

It is not a de Polignac number, because 20423213013 - 2⁶ = 20423212949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423213003) 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 31 ways as a sum of consecutive naturals, for example, 1348503 + ... + 1363563.

It is an arithmetic number, because the mean of its divisors is an integer number (1004454656).

Almost surely, 2^20423213013 is an apocalyptic number.

It is an amenable number.

20423213013 is a deficient number, since it is larger than the sum of its proper divisors (11719335979).

20423213013 is a wasteful number, since it uses less digits than its factorization.

20423213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17185.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20423213013 its reverse (31031232402), we get a palindrome (51454445415).

The spelling of 20423213013 in words is "twenty billion, four hundred twenty-three million, two hundred thirteen thousand, thirteen".