19421402880 has 288 divisors, whose sum is σ = 68821643520. Its totient is φ = 4627824640.

The previous prime is 19421402851. The next prime is 19421402887. The reversal of 19421402880 is 8820412491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421402887) by changing a digit.

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, 2488264 + ... + 2496056.

It is an arithmetic number, because the mean of its divisors is an integer number (238964040).

Almost surely, 2^19421402880 is an apocalyptic number.

19421402880 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 19421402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34410821760).

19421402880 is an abundant number, since it is smaller than the sum of its proper divisors (49400240640).

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

19421402880 is a wasteful number, since it uses less digits than its factorization.

19421402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887 (or 7873 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 19421402880 in words is "nineteen billion, four hundred twenty-one million, four hundred two thousand, eight hundred eighty".