19988860320 has 1152 divisors, whose sum is σ = 87657292800. Its totient is φ = 4205260800.

The previous prime is 19988860313. The next prime is 19988860343. The reversal of 19988860320 is 2306888991.

It is a happy number.

19988860320 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 8 + 8 + 603 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 152586655 + ... + 152586785.

It is an arithmetic number, because the mean of its divisors is an integer number (76091400).

Almost surely, 2^19988860320 is an apocalyptic number.

19988860320 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 19988860320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43828646400).

19988860320 is an abundant number, since it is smaller than the sum of its proper divisors (67668432480).

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

19988860320 is a wasteful number, since it uses less digits than its factorization.

19988860320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 19988860320 in words is "nineteen billion, nine hundred eighty-eight million, eight hundred sixty thousand, three hundred twenty".