20901550080 has 192 divisors, whose sum is σ = 68428039680. Its totient is φ = 5443780608.

The previous prime is 20901550079. The next prime is 20901550097. The reversal of 20901550080 is 8005510902.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313049 + ... + 1328871.

It is an arithmetic number, because the mean of its divisors is an integer number (356396040).

Almost surely, 2^20901550080 is an apocalyptic number.

20901550080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20901550080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34214019840).

20901550080 is an abundant number, since it is smaller than the sum of its proper divisors (47526489600).

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

20901550080 is a wasteful number, since it uses less digits than its factorization.

20901550080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15896 (or 15876 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 20901550080 in words is "twenty billion, nine hundred one million, five hundred fifty thousand, eighty".