20517120622 has 16 divisors (see below), whose sum is σ = 31894119360. Its totient is φ = 9887018848.

The previous prime is 20517120563. The next prime is 20517120623. The reversal of 20517120622 is 22602171502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20517120623) 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 7 ways as a sum of consecutive naturals, for example, 285238 + ... + 349849.

It is an arithmetic number, because the mean of its divisors is an integer number (1993382460).

Almost surely, 2^20517120622 is an apocalyptic number.

20517120622 is a deficient number, since it is larger than the sum of its proper divisors (11376998738).

20517120622 is a wasteful number, since it uses less digits than its factorization.

20517120622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635675.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 20517120622 in words is "twenty billion, five hundred seventeen million, one hundred twenty thousand, six hundred twenty-two".