20431127434 has 16 divisors (see below), whose sum is σ = 31109054472. Its totient is φ = 10061826048.

The previous prime is 20431127419. The next prime is 20431127477. The reversal of 20431127434 is 43472113402.

It can be written as a sum of positive squares in 4 ways, for example, as 20207475409 + 223652025 = 142153^2 + 14955^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20431127396 and 20431127405.

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, 11562 + ... + 202474.

Almost surely, 2^20431127434 is an apocalyptic number.

20431127434 is a deficient number, since it is larger than the sum of its proper divisors (10677927038).

20431127434 is a wasteful number, since it uses less digits than its factorization.

20431127434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191721.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 20431127434 in words is "twenty billion, four hundred thirty-one million, one hundred twenty-seven thousand, four hundred thirty-four".