13720009408 has 84 divisors (see below), whose sum is σ = 31701897480. Its totient is φ = 5874204672.

The previous prime is 13720009403. The next prime is 13720009439. The reversal of 13720009408 is 80490002731.

It is not an unprimeable number, because it can be changed into a prime (13720009403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5100928 + ... + 5103616.

Almost surely, 2^13720009408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13720009408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15850948740).

13720009408 is an abundant number, since it is smaller than the sum of its proper divisors (17981888072).

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

13720009408 is a wasteful number, since it uses less digits than its factorization.

13720009408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4342 (or 4325 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 13720009408 in words is "thirteen billion, seven hundred twenty million, nine thousand, four hundred eight".