20423131424 has 48 divisors (see below), whose sum is σ = 42884128728. Its totient is φ = 9540698112.

The previous prime is 20423131403. The next prime is 20423131447. The reversal of 20423131424 is 42413132402.

It can be written as a sum of positive squares in 4 ways, for example, as 19740250000 + 682881424 = 140500^2 + 26132^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20423131393 and 20423131402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62489 + ... + 211544.

Almost surely, 2^20423131424 is an apocalyptic number.

It is an amenable number.

20423131424 is an abundant number, since it is smaller than the sum of its proper divisors (22460997304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20423131424 is a wasteful number, since it uses less digits than its factorization.

20423131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274197 (or 274189 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20423131424 its reverse (42413132402), we get a palindrome (62836263826).

The spelling of 20423131424 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty-four".