21313876 has 12 divisors (see below), whose sum is σ = 37523808. Its totient is φ = 10592792.

The previous prime is 21313867. The next prime is 21313909. The reversal of 21313876 is 67831312.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 15286 + ... + 16621.

It is an arithmetic number, because the mean of its divisors is an integer number (3126984).

Almost surely, 2^21313876 is an apocalyptic number.

It is an amenable number.

21313876 is a deficient number, since it is larger than the sum of its proper divisors (16209932).

21313876 is a wasteful number, since it uses less digits than its factorization.

21313876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32078 (or 32076 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 21313876 is about 4616.6953549048. The cubic root of 21313876 is about 277.2601655837.

The spelling of 21313876 in words is "twenty-one million, three hundred thirteen thousand, eight hundred seventy-six".