19266478920 has 576 divisors, whose sum is σ = 72250214400. Its totient is φ = 4420915200.

The previous prime is 19266478919. The next prime is 19266478927. The reversal of 19266478920 is 2987466291.

19266478920 is a `hidden beast` number, since 1 + 92 + 66 + 478 + 9 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19266478927) 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 143 ways as a sum of consecutive naturals, for example, 243879441 + ... + 243879519.

It is an arithmetic number, because the mean of its divisors is an integer number (125434400).

Almost surely, 2^19266478920 is an apocalyptic number.

19266478920 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 19266478920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36125107200).

19266478920 is an abundant number, since it is smaller than the sum of its proper divisors (52983735480).

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

19266478920 is a wasteful number, since it uses less digits than its factorization.

19266478920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

It can be divided in two parts, 1926 and 6478920, that added together give a palindrome (6480846).

The spelling of 19266478920 in words is "nineteen billion, two hundred sixty-six million, four hundred seventy-eight thousand, nine hundred twenty".