13440220432 has 20 divisors (see below), whose sum is σ = 26075124736. Its totient is φ = 6711156000.

The previous prime is 13440220429. The next prime is 13440220477. The reversal of 13440220432 is 23402204431.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13440220397 and 13440220406.

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, 547248 + ... + 571279.

Almost surely, 2^13440220432 is an apocalyptic number.

It is an amenable number.

13440220432 is a deficient number, since it is larger than the sum of its proper divisors (12634904304).

13440220432 is a wasteful number, since it uses less digits than its factorization.

13440220432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119286 (or 1119280 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 13440220432 its reverse (23402204431), we get a palindrome (36842424863).

The spelling of 13440220432 in words is "thirteen billion, four hundred forty million, two hundred twenty thousand, four hundred thirty-two".