21446676331 has 4 divisors (see below), whose sum is σ = 21447527112. Its totient is φ = 21445825552.

The previous prime is 21446676323. The next prime is 21446676343. The reversal of 21446676331 is 13367664412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21446676331 - 2³ = 21446676323 is a prime.

It is a super-2 number, since 2×21446676331² (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 (21446676631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386386 + ... + 438391.

It is an arithmetic number, because the mean of its divisors is an integer number (5361881778).

Almost surely, 2^21446676331 is an apocalyptic number.

21446676331 is a deficient number, since it is larger than the sum of its proper divisors (850781).

21446676331 is an equidigital number, since it uses as much as digits as its factorization.

21446676331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850780.

The product of its digits is 435456, while the sum is 43.

The spelling of 21446676331 in words is "twenty-one billion, four hundred forty-six million, six hundred seventy-six thousand, three hundred thirty-one".