13368021 has 4 divisors (see below), whose sum is σ = 17824032. Its totient is φ = 8912012.

The previous prime is 13368011. The next prime is 13368073. The reversal of 13368021 is 12086331.

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 not a de Polignac number, because 13368021 - 2⁶ = 13367957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13367982 and 13368000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13368011) 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, 2228001 + ... + 2228006.

It is an arithmetic number, because the mean of its divisors is an integer number (4456008).

Almost surely, 2^13368021 is an apocalyptic number.

It is an amenable number.

13368021 is a deficient number, since it is larger than the sum of its proper divisors (4456011).

13368021 is an equidigital number, since it uses as much as digits as its factorization.

13368021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456010.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13368021 is about 3656.2304358451. The cubic root of 13368021 is about 237.3316761148.

The spelling of 13368021 in words is "thirteen million, three hundred sixty-eight thousand, twenty-one".