20431155323 has 8 divisors (see below), whose sum is σ = 21321536928. Its totient is φ = 19540946304.

The previous prime is 20431155289. The next prime is 20431155359. The reversal of 20431155323 is 32355113402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431155323 - 2³⁴ = 3251286139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431158323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237761 + ... + 312077.

It is an arithmetic number, because the mean of its divisors is an integer number (2665192116).

Almost surely, 2^20431155323 is an apocalyptic number.

20431155323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20431155323 is a deficient number, since it is larger than the sum of its proper divisors (890381605).

20431155323 is a wasteful number, since it uses less digits than its factorization.

20431155323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86293.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 20431155323 its reverse (32355113402), we get a palindrome (52786268725).

The spelling of 20431155323 in words is "twenty billion, four hundred thirty-one million, one hundred fifty-five thousand, three hundred twenty-three".