20012231023 has 48 divisors (see below), whose sum is σ = 22597603776. Its totient is φ = 17682001920.

The previous prime is 20012231017. The next prime is 20012231027. The reversal of 20012231023 is 32013221002.

It is not a de Polignac number, because 20012231023 - 2⁵ = 20012230991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012230988 and 20012231006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012231027) 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, 83038183 + ... + 83038423.

It is an arithmetic number, because the mean of its divisors is an integer number (470783412).

Almost surely, 2^20012231023 is an apocalyptic number.

20012231023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20012231023 is a deficient number, since it is larger than the sum of its proper divisors (2585372753).

20012231023 is a wasteful number, since it uses less digits than its factorization.

20012231023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20012231023 its reverse (32013221002), we get a palindrome (52025452025).

The spelling of 20012231023 in words is "twenty billion, twelve million, two hundred thirty-one thousand, twenty-three".