19218740424 has 64 divisors (see below), whose sum is σ = 52515099840. Its totient is φ = 5825191680.

The previous prime is 19218740419. The next prime is 19218740461. The reversal of 19218740424 is 42404781291.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438787 + ... + 480594.

It is an arithmetic number, because the mean of its divisors is an integer number (820548435).

Almost surely, 2^19218740424 is an apocalyptic number.

It is an amenable number.

19218740424 is an abundant number, since it is smaller than the sum of its proper divisors (33296359416).

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

19218740424 is a wasteful number, since it uses less digits than its factorization.

19218740424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919470 (or 919466 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 19218740424 in words is "nineteen billion, two hundred eighteen million, seven hundred forty thousand, four hundred twenty-four".