19323223920 has 1120 divisors, whose sum is σ = 90713193984. Its totient is φ = 3695155200.

The previous prime is 19323223919. The next prime is 19323223937. The reversal of 19323223920 is 2932232391.

19323223920 is a `hidden beast` number, since 193 + 232 + 239 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 58378155 + ... + 58378485.

Almost surely, 2^19323223920 is an apocalyptic number.

19323223920 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 19323223920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45356596992).

19323223920 is an abundant number, since it is smaller than the sum of its proper divisors (71389970064).

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

19323223920 is a wasteful number, since it uses less digits than its factorization.

19323223920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The spelling of 19323223920 in words is "nineteen billion, three hundred twenty-three million, two hundred twenty-three thousand, nine hundred twenty".