13720237638 has 32 divisors (see below), whose sum is σ = 27551923200. Its totient is φ = 4554876480.

The previous prime is 13720237627. The next prime is 13720237717. The reversal of 13720237638 is 83673202731.

It is a self number, because there is not a number n which added to its sum of digits gives 13720237638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1591263 + ... + 1599861.

It is an arithmetic number, because the mean of its divisors is an integer number (860997600).

Almost surely, 2^13720237638 is an apocalyptic number.

13720237638 is an abundant number, since it is smaller than the sum of its proper divisors (13831685562).

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

13720237638 is a wasteful number, since it uses less digits than its factorization.

13720237638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652.

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 13720237638 in words is "thirteen billion, seven hundred twenty million, two hundred thirty-seven thousand, six hundred thirty-eight".