21260606953 has 8 divisors (see below), whose sum is σ = 21789129600. Its totient is φ = 20738569488.

The previous prime is 21260606923. The next prime is 21260606981. The reversal of 21260606953 is 35960606212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21260606953 - 2⁵ = 21260606921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21260606923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614658 + ... + 1627771.

It is an arithmetic number, because the mean of its divisors is an integer number (2723641200).

Almost surely, 2^21260606953 is an apocalyptic number.

It is an amenable number.

21260606953 is a deficient number, since it is larger than the sum of its proper divisors (528522647).

21260606953 is an equidigital number, since it uses as much as digits as its factorization.

21260606953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242591.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 21260606953 in words is "twenty-one billion, two hundred sixty million, six hundred six thousand, nine hundred fifty-three".