20194444349440 has 104 divisors (see below), whose sum is σ = 48506998793400. Its totient is φ = 8070068699136.

The previous prime is 20194444349407. The next prime is 20194444349467. The reversal of 20194444349440 is 4494344449102.

It can be written as a sum of positive squares in 4 ways, for example, as 3963730591744 + 16230713757696 = 1990912^2 + 4028736^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21013522 + ... + 21953518.

Almost surely, 2^{20194444349440} is an apocalyptic number.

20194444349440 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 20194444349440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24253499396700).

20194444349440 is an abundant number, since it is smaller than the sum of its proper divisors (28312554443960).

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

20194444349440 is an equidigital number, since it uses as much as digits as its factorization.

20194444349440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941075 (or 941053 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 52.

The spelling of 20194444349440 in words is "twenty trillion, one hundred ninety-four billion, four hundred forty-four million, three hundred forty-nine thousand, four hundred forty".