20023132111 has 4 divisors (see below), whose sum is σ = 20093885512. Its totient is φ = 19952378712.

The previous prime is 20023132091. The next prime is 20023132127. The reversal of 20023132111 is 11123132002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11123132002 = 2 ⋅5561566001.

It is a cyclic number.

It is not a de Polignac number, because 20023132111 - 2⁵ = 20023132079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023132141) 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, 35376276 + ... + 35376841.

It is an arithmetic number, because the mean of its divisors is an integer number (5023471378).

Almost surely, 2^20023132111 is an apocalyptic number.

20023132111 is a deficient number, since it is larger than the sum of its proper divisors (70753401).

20023132111 is an equidigital number, since it uses as much as digits as its factorization.

20023132111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70753400.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20023132111 its reverse (11123132002), we get a palindrome (31146264113).

The spelling of 20023132111 in words is "twenty billion, twenty-three million, one hundred thirty-two thousand, one hundred eleven".