20531072276 has 24 divisors (see below), whose sum is σ = 42210737184. Its totient is φ = 8614435680.

The previous prime is 20531072257. The next prime is 20531072279. The reversal of 20531072276 is 67227013502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531072279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17946170 + ... + 17947313.

It is an arithmetic number, because the mean of its divisors is an integer number (1758780716).

Almost surely, 2^20531072276 is an apocalyptic number.

20531072276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20531072276 is an abundant number, since it is smaller than the sum of its proper divisors (21679664908).

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

20531072276 is a wasteful number, since it uses less digits than its factorization.

20531072276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35893511 (or 35893509 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

Adding to 20531072276 its reverse (67227013502), we get a palindrome (87758085778).

The spelling of 20531072276 in words is "twenty billion, five hundred thirty-one million, seventy-two thousand, two hundred seventy-six".