21196532744 has 16 divisors (see below), whose sum is σ = 39746896620. Its totient is φ = 10597360320.

The previous prime is 21196532737. The next prime is 21196532801. The reversal of 21196532744 is 44723569112.

It can be written as a sum of positive squares in 2 ways, for example, as 21188295844 + 8236900 = 145562^2 + 2870^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21196532695 and 21196532704.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8087 + ... + 206054.

Almost surely, 2^21196532744 is an apocalyptic number.

It is an amenable number.

21196532744 is a deficient number, since it is larger than the sum of its proper divisors (18550363876).

21196532744 is a wasteful number, since it uses less digits than its factorization.

21196532744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226520 (or 226516 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The spelling of 21196532744 in words is "twenty-one billion, one hundred ninety-six million, five hundred thirty-two thousand, seven hundred forty-four".