13584026981 has 4 divisors (see below), whose sum is σ = 15524602272. Its totient is φ = 11643451692.

The previous prime is 13584026959. The next prime is 13584027043. The reversal of 13584026981 is 18962048531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13584026981 is a prime.

It is a super-2 number, since 2×13584026981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13584026881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 970287635 + ... + 970287648.

It is an arithmetic number, because the mean of its divisors is an integer number (3881150568).

Almost surely, 2^13584026981 is an apocalyptic number.

It is an amenable number.

13584026981 is a deficient number, since it is larger than the sum of its proper divisors (1940575291).

13584026981 is an equidigital number, since it uses as much as digits as its factorization.

13584026981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940575290.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 13584026981 in words is "thirteen billion, five hundred eighty-four million, twenty-six thousand, nine hundred eighty-one".