13120432444 has 24 divisors (see below), whose sum is σ = 27621964160. Its totient is φ = 5327092656.

The previous prime is 13120432411. The next prime is 13120432489. The reversal of 13120432444 is 44423402131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 12330702 + ... + 12331765.

Almost surely, 2^13120432444 is an apocalyptic number.

13120432444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13120432444 is an abundant number, since it is smaller than the sum of its proper divisors (14501531716).

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

13120432444 is a wasteful number, since it uses less digits than its factorization.

13120432444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24662497 (or 24662495 counting only the distinct ones).

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

Adding to 13120432444 its reverse (44423402131), we get a palindrome (57543834575).

The spelling of 13120432444 in words is "thirteen billion, one hundred twenty million, four hundred thirty-two thousand, four hundred forty-four".