20023313011 has 4 divisors (see below), whose sum is σ = 21563567872. Its totient is φ = 18483058152.

The previous prime is 20023312987. The next prime is 20023313017. The reversal of 20023313011 is 11031332002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11031332002 = 2 ⋅5515666001.

It is a de Polignac number, because none of the positive numbers 2^k-20023313011 is a prime.

It is a super-2 number, since 2×20023313011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023313017) 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, 770127411 + ... + 770127436.

It is an arithmetic number, because the mean of its divisors is an integer number (5390891968).

Almost surely, 2^20023313011 is an apocalyptic number.

20023313011 is a deficient number, since it is larger than the sum of its proper divisors (1540254861).

20023313011 is a wasteful number, since it uses less digits than its factorization.

20023313011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540254860.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20023313011 its reverse (11031332002), we get a palindrome (31054645013).

The spelling of 20023313011 in words is "twenty billion, twenty-three million, three hundred thirteen thousand, eleven".