20134517166 has 80 divisors (see below), whose sum is σ = 45430849728. Its totient is φ = 6664896000.

The previous prime is 20134517153. The next prime is 20134517191. The reversal of 20134517166 is 66171543102.

20134517166 is a `hidden beast` number, since 2 + 0 + 134 + 517 + 1 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20134517166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18253771 + ... + 18254873.

Almost surely, 2^20134517166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20134517166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22715424864).

20134517166 is an abundant number, since it is smaller than the sum of its proper divisors (25296332562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20134517166 is a wasteful number, since it uses less digits than its factorization.

20134517166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 20134517166 in words is "twenty billion, one hundred thirty-four million, five hundred seventeen thousand, one hundred sixty-six".