13020681 has 16 divisors (see below), whose sum is σ = 18907200. Its totient is φ = 7939008.

The previous prime is 13020677. The next prime is 13020703. The reversal of 13020681 is 18602031.

It is not a de Polignac number, because 13020681 - 2² = 13020677 is a prime.

It is a super-2 number, since 2×13020681² = 339076267407522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13020641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286 + ... + 5591.

It is an arithmetic number, because the mean of its divisors is an integer number (1181700).

Almost surely, 2^13020681 is an apocalyptic number.

It is an amenable number.

13020681 is a deficient number, since it is larger than the sum of its proper divisors (5886519).

13020681 is a wasteful number, since it uses less digits than its factorization.

13020681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13020681 is about 3608.4180744476. The cubic root of 13020681 is about 235.2580897693.

The spelling of 13020681 in words is "thirteen million, twenty thousand, six hundred eighty-one".