20120152172 has 12 divisors (see below), whose sum is σ = 35521862376. Its totient is φ = 9971048640.

The previous prime is 20120152159. The next prime is 20120152249. The reversal of 20120152172 is 27125102102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22256354 + ... + 22257257.

It is an arithmetic number, because the mean of its divisors is an integer number (2960155198).

Almost surely, 2^20120152172 is an apocalyptic number.

It is an amenable number.

20120152172 is a deficient number, since it is larger than the sum of its proper divisors (15401710204).

20120152172 is a wasteful number, since it uses less digits than its factorization.

20120152172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44513728 (or 44513726 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 20120152172 its reverse (27125102102), we get a palindrome (47245254274).

The spelling of 20120152172 in words is "twenty billion, one hundred twenty million, one hundred fifty-two thousand, one hundred seventy-two".