21271313546 has 16 divisors (see below), whose sum is σ = 38610115776. Its totient is φ = 8580025536.

The previous prime is 21271313543. The next prime is 21271313551. The reversal of 21271313546 is 64531317212.

21271313546 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21271313543) 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, 44687396 + ... + 44687871.

It is an arithmetic number, because the mean of its divisors is an integer number (2413132236).

Almost surely, 2^21271313546 is an apocalyptic number.

21271313546 is a deficient number, since it is larger than the sum of its proper divisors (17338802230).

21271313546 is a wasteful number, since it uses less digits than its factorization.

21271313546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89375293.

The product of its digits is 30240, while the sum is 35.

The spelling of 21271313546 in words is "twenty-one billion, two hundred seventy-one million, three hundred thirteen thousand, five hundred forty-six".