21273443286 has 64 divisors (see below), whose sum is σ = 44304623616. Its totient is φ = 6802444800.

The previous prime is 21273443281. The next prime is 21273443327. The reversal of 21273443286 is 68234437212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21273443281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16401390 + ... + 16402686.

It is an arithmetic number, because the mean of its divisors is an integer number (692259744).

Almost surely, 2^21273443286 is an apocalyptic number.

21273443286 is an abundant number, since it is smaller than the sum of its proper divisors (23031180330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21273443286 is a wasteful number, since it uses less digits than its factorization.

21273443286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037.

The product of its digits is 387072, while the sum is 42.

The spelling of 21273443286 in words is "twenty-one billion, two hundred seventy-three million, four hundred forty-three thousand, two hundred eighty-six".