18619254220 has 192 divisors, whose sum is σ = 46811520000. Its totient is φ = 6216204288.

The previous prime is 18619254209. The next prime is 18619254229. The reversal of 18619254220 is 2245291681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18619254229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72448332 + ... + 72448588.

It is an arithmetic number, because the mean of its divisors is an integer number (243810000).

Almost surely, 2^18619254220 is an apocalyptic number.

18619254220 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 18619254220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23405760000).

18619254220 is an abundant number, since it is smaller than the sum of its proper divisors (28192265780).

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

18619254220 is a wasteful number, since it uses less digits than its factorization.

18619254220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 18619254220 in words is "eighteen billion, six hundred nineteen million, two hundred fifty-four thousand, two hundred twenty".