20398054144 has 72 divisors (see below), whose sum is σ = 44781750720. Its totient is φ = 9214107648.

The previous prime is 20398054139. The next prime is 20398054151. The reversal of 20398054144 is 44145089302.

It is a super-2 number, since 2×20398054144² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20398054097 and 20398054106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91212 + ... + 221620.

It is an arithmetic number, because the mean of its divisors is an integer number (621968760).

Almost surely, 2^20398054144 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 20398054144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22390875360).

20398054144 is an abundant number, since it is smaller than the sum of its proper divisors (24383696576).

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

20398054144 is a wasteful number, since it uses less digits than its factorization.

20398054144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130485 (or 130471 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 20398054144 in words is "twenty billion, three hundred ninety-eight million, fifty-four thousand, one hundred forty-four".