21782998535076 has 27 divisors (see below), whose sum is σ = 55062650416683. Its totient is φ = 7260990177240.

The previous prime is 21782998535029. The next prime is 21782998535161. The reversal of 21782998535076 is 67053589928712.

The square root of 21782998535076 is 4667226.

It is a perfect power (a square), and thus also a powerful number.

21782998535076 is a `hidden beast` number, since 2 + 1 + 7 + 8 + 29 + 98 + 5 + 3 + 507 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21782998534995 and 21782998535013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27614421 + ... + 28392291.

Almost surely, 2^{21782998535076} is an apocalyptic number.

21782998535076 is the 4667226-th square number.

It is an amenable number.

21782998535076 is an abundant number, since it is smaller than the sum of its proper divisors (33279651881607).

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

21782998535076 is an frugal number, since it uses more digits than its factorization.

21782998535076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555752 (or 777876 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 72.

The spelling of 21782998535076 in words is "twenty-one trillion, seven hundred eighty-two billion, nine hundred ninety-eight million, five hundred thirty-five thousand, seventy-six".