18419295920 has 40 divisors (see below), whose sum is σ = 43869379680. Its totient is φ = 7188016640.

The previous prime is 18419295907. The next prime is 18419295959. The reversal of 18419295920 is 2959291481.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2804540 + ... + 2811099.

It is an arithmetic number, because the mean of its divisors is an integer number (1096734492).

Almost surely, 2^18419295920 is an apocalyptic number.

18419295920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18419295920 is an abundant number, since it is smaller than the sum of its proper divisors (25450083760).

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

18419295920 is a wasteful number, since it uses less digits than its factorization.

18419295920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5615693 (or 5615687 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 18419295920 in words is "eighteen billion, four hundred nineteen million, two hundred ninety-five thousand, nine hundred twenty".