21271461260 has 48 divisors (see below), whose sum is σ = 51503328576. Its totient is φ = 7228526592.

The previous prime is 21271461257. The next prime is 21271461329. The reversal of 21271461260 is 6216417212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656477 + ... + 688116.

It is an arithmetic number, because the mean of its divisors is an integer number (1072986012).

Almost surely, 2^21271461260 is an apocalyptic number.

21271461260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21271461260 is an abundant number, since it is smaller than the sum of its proper divisors (30231867316).

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

21271461260 is a wasteful number, since it uses less digits than its factorization.

21271461260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344722 (or 1344720 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 21271461260 its reverse (6216417212), we get a palindrome (27487878472).

The spelling of 21271461260 in words is "twenty-one billion, two hundred seventy-one million, four hundred sixty-one thousand, two hundred sixty".