19418065425220 has 768 divisors, whose sum is σ = 57857401405440. Its totient is φ = 5285987942400.

The previous prime is 19418065425193. The next prime is 19418065425229. The reversal of 19418065425220 is 2252456081491.

It is a super-2 number, since 2×19418065425220² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19418065425229) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 9112183555 + ... + 9112185685.

It is an arithmetic number, because the mean of its divisors is an integer number (75335158080).

Almost surely, 2^{19418065425220} is an apocalyptic number.

19418065425220 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 19418065425220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28928700702720).

19418065425220 is an abundant number, since it is smaller than the sum of its proper divisors (38439335980220).

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

19418065425220 is a wasteful number, since it uses less digits than its factorization.

19418065425220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 19418065425220 in words is "nineteen trillion, four hundred eighteen billion, sixty-five million, four hundred twenty-five thousand, two hundred twenty".