19236988920 has 128 divisors (see below), whose sum is σ = 58358880000. Its totient is φ = 5072492544.

The previous prime is 19236988907. The next prime is 19236988921. The reversal of 19236988920 is 2988963291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19236988921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6765019 + ... + 6767861.

It is an arithmetic number, because the mean of its divisors is an integer number (455928750).

Almost surely, 2^19236988920 is an apocalyptic number.

19236988920 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 19236988920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29179440000).

19236988920 is an abundant number, since it is smaller than the sum of its proper divisors (39121891080).

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

19236988920 is a wasteful number, since it uses less digits than its factorization.

19236988920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 19236988920 in words is "nineteen billion, two hundred thirty-six million, nine hundred eighty-eight thousand, nine hundred twenty".