21271810282 has 8 divisors (see below), whose sum is σ = 31908528900. Its totient is φ = 10635633984.

The previous prime is 21271810279. The next prime is 21271810289. The reversal of 21271810282 is 28201817212.

It can be written as a sum of positive squares in 2 ways, for example, as 21240439081 + 31371201 = 145741^2 + 5601^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21271810289) 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, 16657 + ... + 206932.

Almost surely, 2^21271810282 is an apocalyptic number.

21271810282 is a deficient number, since it is larger than the sum of its proper divisors (10636718618).

21271810282 is a wasteful number, since it uses less digits than its factorization.

21271810282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271160.

The product of its (nonzero) digits is 7168, while the sum is 34.

The spelling of 21271810282 in words is "twenty-one billion, two hundred seventy-one million, eight hundred ten thousand, two hundred eighty-two".