21360113 has 8 divisors (see below), whose sum is σ = 21835008. Its totient is φ = 20887984.

The previous prime is 21360107. The next prime is 21360127. The reversal of 21360113 is 31106312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21360113 - 2¹⁶ = 21294577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21360091 and 21360100.

It is not an unprimeable number, because it can be changed into a prime (21360173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24320 + ... + 25182.

It is an arithmetic number, because the mean of its divisors is an integer number (2729376).

Almost surely, 2^21360113 is an apocalyptic number.

It is an amenable number.

21360113 is a deficient number, since it is larger than the sum of its proper divisors (474895).

21360113 is an equidigital number, since it uses as much as digits as its factorization.

21360113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 21360113 is about 4621.7002282710. The cubic root of 21360113 is about 277.4605111139.

Adding to 21360113 its reverse (31106312), we get a palindrome (52466425).

The spelling of 21360113 in words is "twenty-one million, three hundred sixty thousand, one hundred thirteen".