21160475617 has 64 divisors (see below), whose sum is σ = 24743232000. Its totient is φ = 17984913408.

The previous prime is 21160475599. The next prime is 21160475627. The reversal of 21160475617 is 71657406112.

It is a cyclic number.

It is not a de Polignac number, because 21160475617 - 2³¹ = 19012991969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21160475617.

It is not an unprimeable number, because it can be changed into a prime (21160475627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82336353 + ... + 82336609.

It is an arithmetic number, because the mean of its divisors is an integer number (386613000).

Almost surely, 2^21160475617 is an apocalyptic number.

It is an amenable number.

21160475617 is a deficient number, since it is larger than the sum of its proper divisors (3582756383).

21160475617 is a wasteful number, since it uses less digits than its factorization.

21160475617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 21160475617 in words is "twenty-one billion, one hundred sixty million, four hundred seventy-five thousand, six hundred seventeen".