21313676 has 12 divisors (see below), whose sum is σ = 37334472. Its totient is φ = 10646688.

The previous prime is 21313673. The next prime is 21313679. The reversal of 21313676 is 67631312.

It is an interprime number because it is at equal distance from previous prime (21313673) and next prime (21313679).

It is not an unprimeable number, because it can be changed into a prime (21313673) 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, 4136 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (3111206).

Almost surely, 2^21313676 is an apocalyptic number.

It is an amenable number.

21313676 is a deficient number, since it is larger than the sum of its proper divisors (16020796).

21313676 is a wasteful number, since it uses less digits than its factorization.

21313676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080 (or 5078 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 21313676 is about 4616.6736943388. The cubic root of 21313676 is about 277.2592983520.

Adding to 21313676 its reverse (67631312), we get a palindrome (88944988).

The spelling of 21313676 in words is "twenty-one million, three hundred thirteen thousand, six hundred seventy-six".