21093572036 has 6 divisors (see below), whose sum is σ = 36913751070. Its totient is φ = 10546786016.

The previous prime is 21093572029. The next prime is 21093572053. The reversal of 21093572036 is 63027539012.

It can be written as a sum of positive squares in only one way, i.e., 21071425600 + 22146436 = 145160^2 + 4706^2 .

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 as a sum of consecutive naturals, namely, 2636696501 + ... + 2636696508.

It is an arithmetic number, because the mean of its divisors is an integer number (6152291845).

Almost surely, 2^21093572036 is an apocalyptic number.

It is an amenable number.

21093572036 is a deficient number, since it is larger than the sum of its proper divisors (15820179034).

21093572036 is a wasteful number, since it uses less digits than its factorization.

21093572036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273393013 (or 5273393011 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 21093572036 in words is "twenty-one billion, ninety-three million, five hundred seventy-two thousand, thirty-six".