21147810482 has 16 divisors (see below), whose sum is σ = 32236539192. Its totient is φ = 10403020800.

The previous prime is 21147810461. The next prime is 21147810499. The reversal of 21147810482 is 28401874112.

It can be written as a sum of positive squares in 4 ways, for example, as 18382207561 + 2765602921 = 135581^2 + 52589^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122063 + ... + 239154.

Almost surely, 2^21147810482 is an apocalyptic number.

21147810482 is a deficient number, since it is larger than the sum of its proper divisors (11088728710).

21147810482 is a wasteful number, since it uses less digits than its factorization.

21147810482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361693.

The product of its (nonzero) digits is 28672, while the sum is 38.

The spelling of 21147810482 in words is "twenty-one billion, one hundred forty-seven million, eight hundred ten thousand, four hundred eighty-two".