19426012320 has 384 divisors, whose sum is σ = 73842451200. Its totient is φ = 4229038080.

The previous prime is 19426012259. The next prime is 19426012327. The reversal of 19426012320 is 2321062491.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (19426012327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2535856 + ... + 2543504.

It is an arithmetic number, because the mean of its divisors is an integer number (192298050).

Almost surely, 2^19426012320 is an apocalyptic number.

19426012320 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 19426012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36921225600).

19426012320 is an abundant number, since it is smaller than the sum of its proper divisors (54416438880).

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

19426012320 is a wasteful number, since it uses less digits than its factorization.

19426012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728 (or 7720 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 19426012320 in words is "nineteen billion, four hundred twenty-six million, twelve thousand, three hundred twenty".