20101738880 has 96 divisors (see below), whose sum is σ = 49391778240. Its totient is φ = 7823038464.

The previous prime is 20101738871. The next prime is 20101738897. The reversal of 20101738880 is 8883710102.

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, 864689 + ... + 887631.

It is an arithmetic number, because the mean of its divisors is an integer number (514497690).

Almost surely, 2^20101738880 is an apocalyptic number.

20101738880 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 20101738880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24695889120).

20101738880 is an abundant number, since it is smaller than the sum of its proper divisors (29290039360).

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

20101738880 is an equidigital number, since it uses as much as digits as its factorization.

20101738880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23036 (or 22987 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 20101738880 in words is "twenty billion, one hundred one million, seven hundred thirty-eight thousand, eight hundred eighty".