20020111023 has 48 divisors (see below), whose sum is σ = 30932471808. Its totient is φ = 11491867200.

The previous prime is 20020111019. The next prime is 20020111049. The reversal of 20020111023 is 32011102002.

It is not a de Polignac number, because 20020111023 - 2² = 20020111019 is a prime.

It is a super-2 number, since 2×20020111023² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020111003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 509965 + ... + 547817.

It is an arithmetic number, because the mean of its divisors is an integer number (644426496).

Almost surely, 2^20020111023 is an apocalyptic number.

20020111023 is a deficient number, since it is larger than the sum of its proper divisors (10912360785).

20020111023 is a wasteful number, since it uses less digits than its factorization.

20020111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37956 (or 37945 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20020111023 its reverse (32011102002), we get a palindrome (52031213025).

The spelling of 20020111023 in words is "twenty billion, twenty million, one hundred eleven thousand, twenty-three".