20123223124431 has 16 divisors (see below), whose sum is σ = 32277851628800. Its totient is φ = 10893774924288.

The previous prime is 20123223124427. The next prime is 20123223124463. The reversal of 20123223124431 is 13442132232102.

It is a happy number.

It is not a de Polignac number, because 20123223124431 - 2² = 20123223124427 is a prime.

It is a super-2 number, since 2×20123223124431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123223124481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25217071186 + ... + 25217071983.

It is an arithmetic number, because the mean of its divisors is an integer number (2017365726800).

Almost surely, 2^{20123223124431} is an apocalyptic number.

20123223124431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20123223124431 is a deficient number, since it is larger than the sum of its proper divisors (12154628504369).

20123223124431 is a wasteful number, since it uses less digits than its factorization.

20123223124431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50434143198.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 20123223124431 its reverse (13442132232102), we get a palindrome (33565355356533).

The spelling of 20123223124431 in words is "twenty trillion, one hundred twenty-three billion, two hundred twenty-three million, one hundred twenty-four thousand, four hundred thirty-one".