21960539603 has 4 divisors (see below), whose sum is σ = 21962865840. Its totient is φ = 21958213368.

The previous prime is 21960539569. The next prime is 21960539621. The reversal of 21960539603 is 30693506912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21960539603 - 2⁶ = 21960539539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21960539203) 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, 1148900 + ... + 1167857.

It is an arithmetic number, because the mean of its divisors is an integer number (5490716460).

Almost surely, 2^21960539603 is an apocalyptic number.

21960539603 is a deficient number, since it is larger than the sum of its proper divisors (2326237).

21960539603 is an equidigital number, since it uses as much as digits as its factorization.

21960539603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326236.

The product of its (nonzero) digits is 262440, while the sum is 44.

The spelling of 21960539603 in words is "twenty-one billion, nine hundred sixty million, five hundred thirty-nine thousand, six hundred three".