19420380280 has 256 divisors, whose sum is σ = 54444441600. Its totient is φ = 6088642560.

The previous prime is 19420380271. The next prime is 19420380281. The reversal of 19420380280 is 8208302491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420380281) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 17767414 + ... + 17768506.

It is an arithmetic number, because the mean of its divisors is an integer number (212673600).

Almost surely, 2^19420380280 is an apocalyptic number.

19420380280 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 19420380280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27222220800).

19420380280 is an abundant number, since it is smaller than the sum of its proper divisors (35024061320).

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

19420380280 is a wasteful number, since it uses less digits than its factorization.

19420380280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 19420380280 in words is "nineteen billion, four hundred twenty million, three hundred eighty thousand, two hundred eighty".