21096461791 has 8 divisors (see below), whose sum is σ = 22033869840. Its totient is φ = 20178381888.

The previous prime is 21096461753. The next prime is 21096461801. The reversal of 21096461791 is 19716469012.

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 21096461791 - 2³³ = 12506527199 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 (21096461731) 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, 4829806 + ... + 4834171.

It is an arithmetic number, because the mean of its divisors is an integer number (2754233730).

Almost surely, 2^21096461791 is an apocalyptic number.

21096461791 is a deficient number, since it is larger than the sum of its proper divisors (937408049).

21096461791 is an equidigital number, since it uses as much as digits as its factorization.

21096461791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9664073.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 21096461791 in words is "twenty-one billion, ninety-six million, four hundred sixty-one thousand, seven hundred ninety-one".