20794605887 has 36 divisors (see below), whose sum is σ = 24468058944. Its totient is φ = 17598240000.

The previous prime is 20794605851. The next prime is 20794605929. The reversal of 20794605887 is 78850649702.

It is not a de Polignac number, because 20794605887 - 2¹⁰ = 20794604863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20794605827) 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 35 ways as a sum of consecutive naturals, for example, 20982962 + ... + 20983952.

It is an arithmetic number, because the mean of its divisors is an integer number (679668304).

Almost surely, 2^20794605887 is an apocalyptic number.

20794605887 is a deficient number, since it is larger than the sum of its proper divisors (3673453057).

20794605887 is a wasteful number, since it uses less digits than its factorization.

20794605887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 20794605887 in words is "twenty billion, seven hundred ninety-four million, six hundred five thousand, eight hundred eighty-seven".