20152171275 has 24 divisors (see below), whose sum is σ = 33882980160. Its totient is φ = 10565655840.

The previous prime is 20152171261. The next prime is 20152171279. The reversal of 20152171275 is 57217125102.

It is not a de Polignac number, because 20152171275 - 2¹¹ = 20152169227 is a prime.

It is a super-2 number, since 2×20152171275² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20152171279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2272657 + ... + 2281506.

It is an arithmetic number, because the mean of its divisors is an integer number (1411790840).

Almost surely, 2^20152171275 is an apocalyptic number.

20152171275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20152171275 is a deficient number, since it is larger than the sum of its proper divisors (13730808885).

20152171275 is a wasteful number, since it uses less digits than its factorization.

20152171275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554235 (or 4554230 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 33.

Adding to 20152171275 its reverse (57217125102), we get a palindrome (77369296377).

The spelling of 20152171275 in words is "twenty billion, one hundred fifty-two million, one hundred seventy-one thousand, two hundred seventy-five".