20551764696 has 32 divisors (see below), whose sum is σ = 51574786560. Its totient is φ = 6824538272.

The previous prime is 20551764691. The next prime is 20551764721. The reversal of 20551764696 is 69646715502.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551764691) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1621680 + ... + 1634303.

It is an arithmetic number, because the mean of its divisors is an integer number (1611712080).

Almost surely, 2^20551764696 is an apocalyptic number.

It is an amenable number.

20551764696 is an abundant number, since it is smaller than the sum of its proper divisors (31023021864).

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

20551764696 is a wasteful number, since it uses less digits than its factorization.

20551764696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256255 (or 3256251 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 20551764696 in words is "twenty billion, five hundred fifty-one million, seven hundred sixty-four thousand, six hundred ninety-six".