21096061 has 8 divisors (see below), whose sum is σ = 25378880. Its totient is φ = 17130528.

The previous prime is 21096041. The next prime is 21096071. The reversal of 21096061 is 16069012.

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 21096061 - 2⁵ = 21096029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79176 + ... + 79441.

It is an arithmetic number, because the mean of its divisors is an integer number (3172360).

Almost surely, 2^21096061 is an apocalyptic number.

It is an amenable number.

21096061 is a deficient number, since it is larger than the sum of its proper divisors (4282819).

21096061 is a wasteful number, since it uses less digits than its factorization.

21096061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158643.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 21096061 is about 4593.0448506410. The cubic root of 21096061 is about 276.3124524554.

The spelling of 21096061 in words is "twenty-one million, ninety-six thousand, sixty-one".