20555929650 has 24 divisors (see below), whose sum is σ = 50978705904. Its totient is φ = 5481581200.

The previous prime is 20555929619. The next prime is 20555929733. The reversal of 20555929650 is 5692955502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20555929650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68519616 + ... + 68519915.

It is an arithmetic number, because the mean of its divisors is an integer number (2124112746).

Almost surely, 2^20555929650 is an apocalyptic number.

20555929650 is an abundant number, since it is smaller than the sum of its proper divisors (30422776254).

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

20555929650 is a wasteful number, since it uses less digits than its factorization.

20555929650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137039546 (or 137039541 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 48.

The spelling of 20555929650 in words is "twenty billion, five hundred fifty-five million, nine hundred twenty-nine thousand, six hundred fifty".