13667481 has 16 divisors (see below), whose sum is σ = 20632320. Its totient is φ = 8938800.

The previous prime is 13667461. The next prime is 13667483. The reversal of 13667481 is 18476631.

It is not a de Polignac number, because 13667481 - 2¹⁷ = 13536409 is a prime.

It is a super-2 number, since 2×13667481² = 373600073770722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13667483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3345 + ... + 6206.

It is an arithmetic number, because the mean of its divisors is an integer number (1289520).

Almost surely, 2^13667481 is an apocalyptic number.

It is an amenable number.

13667481 is a deficient number, since it is larger than the sum of its proper divisors (6964839).

13667481 is an equidigital number, since it uses as much as digits as its factorization.

13667481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9613 (or 9607 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 13667481 is about 3696.9556394417. The cubic root of 13667481 is about 239.0907785848.

The spelling of 13667481 in words is "thirteen million, six hundred sixty-seven thousand, four hundred eighty-one".