20371745280 has 160 divisors (see below), whose sum is σ = 68554094400. Its totient is φ = 5146509312.

The previous prime is 20371745243. The next prime is 20371745281. The reversal of 20371745280 is 8254717302.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (20371745281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76116 + ... + 215724.

It is an arithmetic number, because the mean of its divisors is an integer number (428463090).

Almost surely, 2^20371745280 is an apocalyptic number.

20371745280 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 20371745280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34277047200).

20371745280 is an abundant number, since it is smaller than the sum of its proper divisors (48182349120).

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

20371745280 is a wasteful number, since it uses less digits than its factorization.

20371745280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139654 (or 139638 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 20371745280 in words is "twenty billion, three hundred seventy-one million, seven hundred forty-five thousand, two hundred eighty".