19764360720 has 480 divisors, whose sum is σ = 76299580800. Its totient is φ = 4694796288.

The previous prime is 19764360719. The next prime is 19764360727. The reversal of 19764360720 is 2706346791.

19764360720 is a `hidden beast` number, since 19 + 7 + 6 + 4 + 3 + 607 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19764360727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10585227 + ... + 10587093.

It is an arithmetic number, because the mean of its divisors is an integer number (158957460).

Almost surely, 2^19764360720 is an apocalyptic number.

19764360720 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 19764360720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38149790400).

19764360720 is an abundant number, since it is smaller than the sum of its proper divisors (56535220080).

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

19764360720 is a wasteful number, since it uses less digits than its factorization.

19764360720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 19764360720 in words is "nineteen billion, seven hundred sixty-four million, three hundred sixty thousand, seven hundred twenty".