21677113173 has 8 divisors (see below), whose sum is σ = 29574976288. Its totient is φ = 14115329424.

The previous prime is 21677113109. The next prime is 21677113177. The reversal of 21677113173 is 37131177612.

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

It is not a de Polignac number, because 21677113173 - 2⁶ = 21677113109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21677113177) 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, 84019690 + ... + 84019947.

It is an arithmetic number, because the mean of its divisors is an integer number (3696872036).

Almost surely, 2^21677113173 is an apocalyptic number.

It is an amenable number.

21677113173 is a deficient number, since it is larger than the sum of its proper divisors (7897863115).

21677113173 is a wasteful number, since it uses less digits than its factorization.

21677113173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168039683.

The product of its digits is 37044, while the sum is 39.

The spelling of 21677113173 in words is "twenty-one billion, six hundred seventy-seven million, one hundred thirteen thousand, one hundred seventy-three".