21714696 has 64 divisors (see below), whose sum is σ = 60720000. Its totient is φ = 7190208.

The previous prime is 21714617. The next prime is 21714703. The reversal of 21714696 is 69641712.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21714696.

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 15 ways as a sum of consecutive naturals, for example, 49245 + ... + 49683.

It is an arithmetic number, because the mean of its divisors is an integer number (948750).

Almost surely, 2^21714696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21714696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30360000).

21714696 is an abundant number, since it is smaller than the sum of its proper divisors (39005304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21714696 is a wasteful number, since it uses less digits than its factorization.

21714696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 673 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 21714696 is about 4659.9030032824. The cubic root of 21714696 is about 278.9873968177.

The spelling of 21714696 in words is "twenty-one million, seven hundred fourteen thousand, six hundred ninety-six".