21083582131 has 8 divisors (see below), whose sum is σ = 21576693600. Its totient is φ = 20595919680.

The previous prime is 21083582129. The next prime is 21083582147. The reversal of 21083582131 is 13128538012.

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 21083582131 - 2¹ = 21083582129 is a prime.

It is a super-2 number, since 2×21083582131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21083582101) 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, 1354426 + ... + 1369903.

It is an arithmetic number, because the mean of its divisors is an integer number (2697086700).

Almost surely, 2^21083582131 is an apocalyptic number.

21083582131 is a deficient number, since it is larger than the sum of its proper divisors (493111469).

21083582131 is a wasteful number, since it uses less digits than its factorization.

21083582131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724509.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 21083582131 in words is "twenty-one billion, eighty-three million, five hundred eighty-two thousand, one hundred thirty-one".