20750000172 has 48 divisors (see below), whose sum is σ = 52840795392. Its totient is φ = 6285186880.

The previous prime is 20750000171. The next prime is 20750000179. The reversal of 20750000172 is 27100005702.

It is not an unprimeable number, because it can be changed into a prime (20750000171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287398 + ... + 352274.

It is an arithmetic number, because the mean of its divisors is an integer number (1100849904).

Almost surely, 2^20750000172 is an apocalyptic number.

20750000172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20750000172 is an abundant number, since it is smaller than the sum of its proper divisors (32090795220).

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

20750000172 is a wasteful number, since it uses less digits than its factorization.

20750000172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67318 (or 67316 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

Adding to 20750000172 its reverse (27100005702), we get a palindrome (47850005874).

The spelling of 20750000172 in words is "twenty billion, seven hundred fifty million, one hundred seventy-two", and thus it is an aban number.