19513434880 has 36 divisors (see below), whose sum is σ = 46740777552. Its totient is φ = 7805373440.

The previous prime is 19513434859. The next prime is 19513434911. The reversal of 19513434880 is 8843431591.

It is a super-2 number, since 2×19513434880² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19513434880.

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 3 ways as a sum of consecutive naturals, for example, 7621156 + ... + 7623715.

It is an arithmetic number, because the mean of its divisors is an integer number (1298354932).

Almost surely, 2^19513434880 is an apocalyptic number.

19513434880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19513434880 is an abundant number, since it is smaller than the sum of its proper divisors (27227342672).

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

19513434880 is an equidigital number, since it uses as much as digits as its factorization.

19513434880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15244892 (or 15244878 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 19513434880 in words is "nineteen billion, five hundred thirteen million, four hundred thirty-four thousand, eight hundred eighty".