19045475780 has 12 divisors (see below), whose sum is σ = 39995499180. Its totient is φ = 7618190304.

The previous prime is 19045475777. The next prime is 19045475837. The reversal of 19045475780 is 8757454091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7045587844 + 11999887936 = 83938^2 + 109544^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476136875 + ... + 476136914.

It is an arithmetic number, because the mean of its divisors is an integer number (3332958265).

Almost surely, 2^19045475780 is an apocalyptic number.

19045475780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19045475780 is an abundant number, since it is smaller than the sum of its proper divisors (20950023400).

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

19045475780 is a wasteful number, since it uses less digits than its factorization.

19045475780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952273798 (or 952273796 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 19045475780 in words is "nineteen billion, forty-five million, four hundred seventy-five thousand, seven hundred eighty".