20413431424 has 16 divisors (see below), whose sum is σ = 40667383170. Its totient is φ = 10206715648.

The previous prime is 20413431421. The next prime is 20413431457. The reversal of 20413431424 is 42413431402.

It can be written as a sum of positive squares in only one way, i.e., 20243598400 + 169833024 = 142280^2 + 13032^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 20413431392 and 20413431401.

It is not an unprimeable number, because it can be changed into a prime (20413431421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79739839 + ... + 79740094.

Almost surely, 2^20413431424 is an apocalyptic number.

It is an amenable number.

20413431424 is a deficient number, since it is larger than the sum of its proper divisors (20253951746).

20413431424 is an equidigital number, since it uses as much as digits as its factorization.

20413431424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159479947 (or 159479935 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20413431424 its reverse (42413431402), we get a palindrome (62826862826).

The spelling of 20413431424 in words is "twenty billion, four hundred thirteen million, four hundred thirty-one thousand, four hundred twenty-four".