21170516675 has 48 divisors (see below), whose sum is σ = 33425574912. Its totient is φ = 12916358400.

The previous prime is 21170516651. The next prime is 21170516701. The reversal of 21170516675 is 57661507112.

It is not a de Polignac number, because 21170516675 - 2¹⁰ = 21170515651 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26522 + ... + 207471.

It is an arithmetic number, because the mean of its divisors is an integer number (696366144).

Almost surely, 2^21170516675 is an apocalyptic number.

21170516675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21170516675 is a deficient number, since it is larger than the sum of its proper divisors (12255058237).

21170516675 is a wasteful number, since it uses less digits than its factorization.

21170516675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234068 (or 234063 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 21170516675 in words is "twenty-one billion, one hundred seventy million, five hundred sixteen thousand, six hundred seventy-five".