21086097243 has 8 divisors (see below), whose sum is σ = 28138367568. Its totient is φ = 14045612544.

The previous prime is 21086097211. The next prime is 21086097257. The reversal of 21086097243 is 34279068012.

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

It is not a de Polignac number, because 21086097243 - 2⁵ = 21086097211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21086097195 and 21086097204.

It is not an unprimeable number, because it can be changed into a prime (21086097293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2942230 + ... + 2949387.

It is an arithmetic number, because the mean of its divisors is an integer number (3517295946).

Almost surely, 2^21086097243 is an apocalyptic number.

21086097243 is a deficient number, since it is larger than the sum of its proper divisors (7052270325).

21086097243 is a wasteful number, since it uses less digits than its factorization.

21086097243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892813.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 21086097243 in words is "twenty-one billion, eighty-six million, ninety-seven thousand, two hundred forty-three".