21096673 has 8 divisors (see below), whose sum is σ = 23274216. Its totient is φ = 18998400.

The previous prime is 21096671. The next prime is 21096683. The reversal of 21096673 is 37669012.

It can be written as a sum of positive squares in 4 ways, for example, as 1024 + 21095649 = 32^2 + 4593^2 .

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 21096673 - 2¹ = 21096671 is a prime.

It is a super-2 number, since 2×21096673² = 890139223337858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21096671) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19258 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (2909277).

Almost surely, 2^21096673 is an apocalyptic number.

It is an amenable number.

21096673 is a deficient number, since it is larger than the sum of its proper divisors (2177543).

21096673 is a wasteful number, since it uses less digits than its factorization.

21096673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39635.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 21096673 is about 4593.1114726294. Note that the first 3 decimals coincide. The cubic root of 21096673 is about 276.3151243852.

The spelling of 21096673 in words is "twenty-one million, ninety-six thousand, six hundred seventy-three".