20920825184 has 108 divisors (see below), whose sum is σ = 48399081444. Its totient is φ = 8875899648.

The previous prime is 20920825181. The next prime is 20920825229. The reversal of 20920825184 is 48152802902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920825181) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18628847 + ... + 18629969.

It is an arithmetic number, because the mean of its divisors is an integer number (448139643).

Almost surely, 2^20920825184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20920825184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24199540722).

20920825184 is an abundant number, since it is smaller than the sum of its proper divisors (27478256260).

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

20920825184 is a wasteful number, since it uses less digits than its factorization.

20920825184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 20920825184 in words is "twenty billion, nine hundred twenty million, eight hundred twenty-five thousand, one hundred eighty-four".