21676306231 has 8 divisors (see below), whose sum is σ = 22629028320. Its totient is φ = 20724440352.

The previous prime is 21676306213. The next prime is 21676306259. The reversal of 21676306231 is 13260367612.

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

It is a de Polignac number, because none of the positive numbers 2^k-21676306231 is a prime.

It is a super-2 number, since 2×21676306231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676306291) 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, 162036 + ... + 263833.

It is an arithmetic number, because the mean of its divisors is an integer number (2828628540).

Almost surely, 2^21676306231 is an apocalyptic number.

21676306231 is a deficient number, since it is larger than the sum of its proper divisors (952722089).

21676306231 is a wasteful number, since it uses less digits than its factorization.

21676306231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428105.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 21676306231 in words is "twenty-one billion, six hundred seventy-six million, three hundred six thousand, two hundred thirty-one".