20894757696 has 42 divisors (see below), whose sum is σ = 59891051922. Its totient is φ = 6964919040.

The previous prime is 20894757679. The next prime is 20894757707. The reversal of 20894757696 is 69675749802.

20894757696 is a `hidden beast` number, since 2 + 0 + 8 + 9 + 475 + 76 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20084558400 + 810199296 = 141720^2 + 28464^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18137235 + ... + 18138386.

Almost surely, 2^20894757696 is an apocalyptic number.

It is an amenable number.

20894757696 is an abundant number, since it is smaller than the sum of its proper divisors (38996294226).

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

20894757696 is a wasteful number, since it uses less digits than its factorization.

20894757696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36275639 (or 36275626 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 20894757696 in words is "twenty billion, eight hundred ninety-four million, seven hundred fifty-seven thousand, six hundred ninety-six".