21106136330 has 16 divisors (see below), whose sum is σ = 38034380520. Its totient is φ = 8432824512.

The previous prime is 21106136309. The next prime is 21106136393. The reversal of 21106136330 is 3363160112.

It can be written as a sum of positive squares in 4 ways, for example, as 16262115529 + 4844020801 = 127523^2 + 69599^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21106136330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194545 + ... + 1212084.

Almost surely, 2^21106136330 is an apocalyptic number.

21106136330 is a deficient number, since it is larger than the sum of its proper divisors (16928244190).

21106136330 is a wasteful number, since it uses less digits than its factorization.

21106136330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407513.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21106136330 its reverse (3363160112), we get a palindrome (24469296442).

The spelling of 21106136330 in words is "twenty-one billion, one hundred six million, one hundred thirty-six thousand, three hundred thirty".