19494021120 has 384 divisors, whose sum is σ = 71752262400. Its totient is φ = 4426039296.

The previous prime is 19494021103. The next prime is 19494021139. The reversal of 19494021120 is 2112049491.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57845592 + ... + 57845928.

It is an arithmetic number, because the mean of its divisors is an integer number (186854850).

Almost surely, 2^19494021120 is an apocalyptic number.

19494021120 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 19494021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35876131200).

19494021120 is an abundant number, since it is smaller than the sum of its proper divisors (52258241280).

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

19494021120 is a wasteful number, since it uses less digits than its factorization.

19494021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 19494021120 in words is "nineteen billion, four hundred ninety-four million, twenty-one thousand, one hundred twenty".