20023011111 has 64 divisors (see below), whose sum is σ = 30292807680. Its totient is φ = 11702046720.

The previous prime is 20023011097. The next prime is 20023011121. The reversal of 20023011111 is 11111032002.

It is not a de Polignac number, because 20023011111 - 2¹⁵ = 20022978343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023011121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4933395 + ... + 4937451.

It is an arithmetic number, because the mean of its divisors is an integer number (473325120).

Almost surely, 2^20023011111 is an apocalyptic number.

20023011111 is a deficient number, since it is larger than the sum of its proper divisors (10269796569).

20023011111 is a wasteful number, since it uses less digits than its factorization.

20023011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20023011111 its reverse (11111032002), we get a palindrome (31134043113).

The spelling of 20023011111 in words is "twenty billion, twenty-three million, eleven thousand, one hundred eleven".