20732229081 has 12 divisors (see below), whose sum is σ = 29957466708. Its totient is φ = 13816449024.

The previous prime is 20732229047. The next prime is 20732229083. The reversal of 20732229081 is 18092223702.

It can be written as a sum of positive squares in 2 ways, for example, as 15646257225 + 5085971856 = 125085^2 + 71316^2 .

It is not a de Polignac number, because 20732229081 - 2¹⁰ = 20732228057 is a prime.

It is a super-2 number, since 2×20732229081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20732229083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393600 + ... + 443153.

It is an arithmetic number, because the mean of its divisors is an integer number (2496455559).

Almost surely, 2^20732229081 is an apocalyptic number.

It is an amenable number.

20732229081 is a deficient number, since it is larger than the sum of its proper divisors (9225237627).

20732229081 is a wasteful number, since it uses less digits than its factorization.

20732229081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839512 (or 839509 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20732229081 in words is "twenty billion, seven hundred thirty-two million, two hundred twenty-nine thousand, eighty-one".