20275196881 has 3 divisors (see below), whose sum is σ = 20275339273. Its totient is φ = 20275054490.

The previous prime is 20275196797. The next prime is 20275196891. The reversal of 20275196881 is 18869157202.

It is a happy number.

The square root of 20275196881 is 142391.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 20275196881 - 2⁹ = 20275196369 is a prime.

It is a super-2 number, since 2×20275196881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20275196891) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71196 + ... + 213586.

Almost surely, 2^20275196881 is an apocalyptic number.

20275196881 is the 142391-st square number.

20275196881 is the 71196-th centered octagonal number.

It is an amenable number.

20275196881 is a deficient number, since it is larger than the sum of its proper divisors (142392).

20275196881 is an frugal number, since it uses more digits than its factorization.

20275196881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284782 (or 142391 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

Multiplying 20275196881 by its sum of digits (49), we get a square (993484647169 = 996737²).

It can be divided in two parts, 20275 and 196881, that added together give a square (217156 = 466²).

The spelling of 20275196881 in words is "twenty billion, two hundred seventy-five million, one hundred ninety-six thousand, eight hundred eighty-one".