20929755800 has 48 divisors (see below), whose sum is σ = 48865399200. Its totient is φ = 8336854400.

The previous prime is 20929755739. The next prime is 20929755823. The reversal of 20929755800 is 855792902.

It is a congruent number.

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, 171131 + ... + 266730.

It is an arithmetic number, because the mean of its divisors is an integer number (1018029150).

Almost surely, 2^20929755800 is an apocalyptic number.

20929755800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20929755800 is an abundant number, since it is smaller than the sum of its proper divisors (27935643400).

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

20929755800 is a wasteful number, since it uses less digits than its factorization.

20929755800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438116 (or 438107 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 20929755800 in words is "twenty billion, nine hundred twenty-nine million, seven hundred fifty-five thousand, eight hundred".