20750000166 has 144 divisors (see below), whose sum is σ = 52795701504. Its totient is φ = 5768656704.

The previous prime is 20750000113. The next prime is 20750000171. The reversal of 20750000166 is 66100005702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 124251415 + ... + 124251581.

It is an arithmetic number, because the mean of its divisors is an integer number (366636816).

Almost surely, 2^20750000166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20750000166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26397850752).

20750000166 is an abundant number, since it is smaller than the sum of its proper divisors (32045701338).

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

20750000166 is a wasteful number, since it uses less digits than its factorization.

20750000166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 20750000166 its reverse (66100005702), we get a palindrome (86850005868).

The spelling of 20750000166 in words is "twenty billion, seven hundred fifty million, one hundred sixty-six", and thus it is an aban number.