20431100423 has 8 divisors (see below), whose sum is σ = 20636302176. Its totient is φ = 20225956000.

The previous prime is 20431100419. The next prime is 20431100441. The reversal of 20431100423 is 32400113402.

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 20431100423 - 2² = 20431100419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20431100395 and 20431100404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431100483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303493 + ... + 1319073.

It is an arithmetic number, because the mean of its divisors is an integer number (2579537772).

Almost surely, 2^20431100423 is an apocalyptic number.

20431100423 is a deficient number, since it is larger than the sum of its proper divisors (205201753).

20431100423 is a wasteful number, since it uses less digits than its factorization.

20431100423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28665.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20431100423 its reverse (32400113402), we get a palindrome (52831213825).

The spelling of 20431100423 in words is "twenty billion, four hundred thirty-one million, one hundred thousand, four hundred twenty-three".