18983980221440 has 704 divisors, whose sum is σ = 53383663872000. Its totient is φ = 6417237934080.

The previous prime is 18983980221389. The next prime is 18983980221463. The reversal of 18983980221440 is 4412208938981.

It is a super-2 number, since 2×18983980221440² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18983980221440.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5651674481 + ... + 5651677839.

It is an arithmetic number, because the mean of its divisors is an integer number (75829068000).

Almost surely, 2^{18983980221440} is an apocalyptic number.

18983980221440 is a gapful number since it is divisible by the number (10) 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 18983980221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26691831936000).

18983980221440 is an abundant number, since it is smaller than the sum of its proper divisors (34399683650560).

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

18983980221440 is a wasteful number, since it uses less digits than its factorization.

18983980221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566 (or 3548 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 59.

The spelling of 18983980221440 in words is "eighteen trillion, nine hundred eighty-three billion, nine hundred eighty million, two hundred twenty-one thousand, four hundred forty".