21094794682 has 32 divisors (see below), whose sum is σ = 35657595792. Its totient is φ = 9294165504.

The previous prime is 21094794661. The next prime is 21094794683. The reversal of 21094794682 is 28649749012.

It can be written as a sum of positive squares in 8 ways, for example, as 12557219481 + 8537575201 = 112059^2 + 92399^2 .

It is a super-2 number, since 2×21094794682² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21094794683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155883 + ... + 257854.

Almost surely, 2^21094794682 is an apocalyptic number.

21094794682 is a deficient number, since it is larger than the sum of its proper divisors (14562801110).

21094794682 is a wasteful number, since it uses less digits than its factorization.

21094794682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413842.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 21094794682 in words is "twenty-one billion, ninety-four million, seven hundred ninety-four thousand, six hundred eighty-two".