13988942005 has 4 divisors (see below), whose sum is σ = 16786730412. Its totient is φ = 11191153600.

The previous prime is 13988942003. The next prime is 13988942041. The reversal of 13988942005 is 50024988931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9644418436 + 4344523569 = 98206^2 + 65913^2 .

It is not a de Polignac number, because 13988942005 - 2¹ = 13988942003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13988942005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988942003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398894196 + ... + 1398894205.

It is an arithmetic number, because the mean of its divisors is an integer number (4196682603).

Almost surely, 2^13988942005 is an apocalyptic number.

It is an amenable number.

13988942005 is a deficient number, since it is larger than the sum of its proper divisors (2797788407).

13988942005 is an equidigital number, since it uses as much as digits as its factorization.

13988942005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797788406.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 13988942005 in words is "thirteen billion, nine hundred eighty-eight million, nine hundred forty-two thousand, five".