21096873 has 24 divisors (see below), whose sum is σ = 34988928. Its totient is φ = 11999232.

The previous prime is 21096839. The next prime is 21096877. The reversal of 21096873 is 37869012.

It is not a de Polignac number, because 21096873 - 2¹⁰ = 21095849 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15540 + ... + 16842.

It is an arithmetic number, because the mean of its divisors is an integer number (1457872).

Almost surely, 2^21096873 is an apocalyptic number.

It is an amenable number.

21096873 is a deficient number, since it is larger than the sum of its proper divisors (13892055).

21096873 is a wasteful number, since it uses less digits than its factorization.

21096873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573 (or 1570 counting only the distinct ones).

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

The square root of 21096873 is about 4593.1332443116. The cubic root of 21096873 is about 276.3159975537.

The spelling of 21096873 in words is "twenty-one million, ninety-six thousand, eight hundred seventy-three".