21416979170 has 16 divisors (see below), whose sum is σ = 40579539840. Its totient is φ = 8115907824.

The previous prime is 21416979163. The next prime is 21416979239. The reversal of 21416979170 is 7197961412.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56360282 + ... + 56360661.

It is an arithmetic number, because the mean of its divisors is an integer number (2536221240).

Almost surely, 2^21416979170 is an apocalyptic number.

21416979170 is a deficient number, since it is larger than the sum of its proper divisors (19162560670).

21416979170 is a wasteful number, since it uses less digits than its factorization.

21416979170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112720969.

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 21416979170 in words is "twenty-one billion, four hundred sixteen million, nine hundred seventy-nine thousand, one hundred seventy".