20795891328 has 48 divisors (see below), whose sum is σ = 59842346850. Its totient is φ = 6931963392.

The previous prime is 20795891327. The next prime is 20795891339. The reversal of 20795891328 is 82319859702.

20795891328 is a `hidden beast` number, since 20 + 7 + 9 + 589 + 1 + 32 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19962298944 + 833592384 = 141288^2 + 28872^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×20795891328² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20795891321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9024843 + ... + 9027146.

Almost surely, 2^20795891328 is an apocalyptic number.

It is an amenable number.

20795891328 is an abundant number, since it is smaller than the sum of its proper divisors (39046455522).

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

20795891328 is a wasteful number, since it uses less digits than its factorization.

20795891328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18052009 (or 18051994 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 20795891328 in words is "twenty billion, seven hundred ninety-five million, eight hundred ninety-one thousand, three hundred twenty-eight".