21478277482 has 32 divisors (see below), whose sum is σ = 34273256400. Its totient is φ = 10075580928.

The previous prime is 21478277417. The next prime is 21478277537. The reversal of 21478277482 is 28477287412.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9792883681 + 11685393801 = 98959^2 + 108099^2 .

It is a super-2 number, since 2×21478277482² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1772998 + ... + 1785070.

Almost surely, 2^21478277482 is an apocalyptic number.

21478277482 is a deficient number, since it is larger than the sum of its proper divisors (12794978918).

21478277482 is a wasteful number, since it uses less digits than its factorization.

21478277482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970.

The product of its digits is 2809856, while the sum is 52.

The spelling of 21478277482 in words is "twenty-one billion, four hundred seventy-eight million, two hundred seventy-seven thousand, four hundred eighty-two".