20431322434 has 8 divisors (see below), whose sum is σ = 30667570380. Its totient is φ = 10208798976.

The previous prime is 20431322423. The next prime is 20431322447. The reversal of 20431322434 is 43422313402.

It can be written as a sum of positive squares in 2 ways, for example, as 20430414225 + 908209 = 142935^2 + 953^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3427399 + ... + 3433354.

Almost surely, 2^20431322434 is an apocalyptic number.

20431322434 is a deficient number, since it is larger than the sum of its proper divisors (10236247946).

20431322434 is a wasteful number, since it uses less digits than its factorization.

20431322434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862244.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20431322434 its reverse (43422313402), we get a palindrome (63853635836).

The spelling of 20431322434 in words is "twenty billion, four hundred thirty-one million, three hundred twenty-two thousand, four hundred thirty-four".