21096718 has 8 divisors (see below), whose sum is σ = 31847112. Its totient is φ = 10481016.

The previous prime is 21096683. The next prime is 21096739. The reversal of 21096718 is 81769012.

It is a happy number.

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

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, 33280 + ... + 33907.

It is an arithmetic number, because the mean of its divisors is an integer number (3980889).

Almost surely, 2^21096718 is an apocalyptic number.

21096718 is a deficient number, since it is larger than the sum of its proper divisors (10750394).

21096718 is a wasteful number, since it uses less digits than its factorization.

21096718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67346.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 21096718 is about 4593.1163712669. The cubic root of 21096718 is about 276.3153208486.

The spelling of 21096718 in words is "twenty-one million, ninety-six thousand, seven hundred eighteen".