19045690884 has 54 divisors (see below), whose sum is σ = 52917825870. Its totient is φ = 5771420160.

The previous prime is 19045690879. The next prime is 19045690907. The reversal of 19045690884 is 48809654091.

It can be written as a sum of positive squares in only one way, i.e., 9696734784 + 9348956100 = 98472^2 + 96690^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19045690884.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2181789 + ... + 2190500.

Almost surely, 2^19045690884 is an apocalyptic number.

It is an amenable number.

19045690884 is an abundant number, since it is smaller than the sum of its proper divisors (33872134986).

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

19045690884 is a wasteful number, since it uses less digits than its factorization.

19045690884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372321 (or 4372305 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 19045690884 in words is "nineteen billion, forty-five million, six hundred ninety thousand, eight hundred eighty-four".