21432708783466 has 16 divisors (see below), whose sum is σ = 34072634723400. Its totient is φ = 10076365734400.

The previous prime is 21432708783427. The next prime is 21432708783529. The reversal of 21432708783466 is 66438780723412.

It can be written as a sum of positive squares in 4 ways, for example, as 20747159559025 + 685549224441 = 4554905^2 + 827979^2 .

It is a super-2 number, since 2×21432708783466² (a number of 27 digits) contains 22 as substring.

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, 300428485 + ... + 300499816.

Almost surely, 2^{21432708783466} is an apocalyptic number.

21432708783466 is a deficient number, since it is larger than the sum of its proper divisors (12639925939934).

21432708783466 is a wasteful number, since it uses less digits than its factorization.

21432708783466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600929369.

The product of its (nonzero) digits is 65028096, while the sum is 61.

The spelling of 21432708783466 in words is "twenty-one trillion, four hundred thirty-two billion, seven hundred eight million, seven hundred eighty-three thousand, four hundred sixty-six".