19218495940 has 72 divisors (see below), whose sum is σ = 48217176000. Its totient is φ = 6302687424.

The previous prime is 19218495913. The next prime is 19218495997. The reversal of 19218495940 is 4959481291.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 55690 + ... + 203809.

It is an arithmetic number, because the mean of its divisors is an integer number (669683000).

Almost surely, 2^19218495940 is an apocalyptic number.

19218495940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19218495940 is an abundant number, since it is smaller than the sum of its proper divisors (28998680060).

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

19218495940 is a wasteful number, since it uses less digits than its factorization.

19218495940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259561 (or 259536 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 19218495940 in words is "nineteen billion, two hundred eighteen million, four hundred ninety-five thousand, nine hundred forty".