17919580420 has 24 divisors (see below), whose sum is σ = 43006993344. Its totient is φ = 6143856096.

The previous prime is 17919580387. The next prime is 17919580487. The reversal of 17919580420 is 2408591971.

It is a super-2 number, since 2×17919580420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63998362 + ... + 63998641.

It is an arithmetic number, because the mean of its divisors is an integer number (1791958056).

Almost surely, 2^17919580420 is an apocalyptic number.

17919580420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17919580420 is an abundant number, since it is smaller than the sum of its proper divisors (25087412924).

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

17919580420 is a wasteful number, since it uses less digits than its factorization.

17919580420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127997019 (or 127997017 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 17919580420 in words is "seventeen billion, nine hundred nineteen million, five hundred eighty thousand, four hundred twenty".