20733761128 has 32 divisors (see below), whose sum is σ = 39274230600. Its totient is φ = 10260836352.

The previous prime is 20733761101. The next prime is 20733761129. The reversal of 20733761128 is 82116733702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18171579204 + 2562181924 = 134802^2 + 50618^2 .

It is not an unprimeable number, because it can be changed into a prime (20733761129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839776 + ... + 864112.

Almost surely, 2^20733761128 is an apocalyptic number.

It is an amenable number.

20733761128 is a deficient number, since it is larger than the sum of its proper divisors (18540469472).

20733761128 is a wasteful number, since it uses less digits than its factorization.

20733761128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25429 (or 25425 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 20733761128 in words is "twenty billion, seven hundred thirty-three million, seven hundred sixty-one thousand, one hundred twenty-eight".