21026560036 has 12 divisors (see below), whose sum is σ = 36801692928. Its totient is φ = 10511790632.

The previous prime is 21026560031. The next prime is 21026560039. The reversal of 21026560036 is 63006562012.

It is not an unprimeable number, because it can be changed into a prime (21026560031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340276 + ... + 397291.

It is an arithmetic number, because the mean of its divisors is an integer number (3066807744).

Almost surely, 2^21026560036 is an apocalyptic number.

It is an amenable number.

21026560036 is a deficient number, since it is larger than the sum of its proper divisors (15775132892).

21026560036 is a wasteful number, since it uses less digits than its factorization.

21026560036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744698 (or 744696 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 21026560036 in words is "twenty-one billion, twenty-six million, five hundred sixty thousand, thirty-six".