19428217876 has 24 divisors (see below), whose sum is σ = 34265385000. Its totient is φ = 9638252544.

The previous prime is 19428217873. The next prime is 19428217889. The reversal of 19428217876 is 67871282491.

It can be written as a sum of positive squares in 4 ways, for example, as 16483600 + 19411734276 = 4060^2 + 139326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428217873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536140 + ... + 571228.

It is an arithmetic number, because the mean of its divisors is an integer number (1427724375).

Almost surely, 2^19428217876 is an apocalyptic number.

It is an amenable number.

19428217876 is a deficient number, since it is larger than the sum of its proper divisors (14837167124).

19428217876 is a wasteful number, since it uses less digits than its factorization.

19428217876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36171 (or 36169 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 55.

The spelling of 19428217876 in words is "nineteen billion, four hundred twenty-eight million, two hundred seventeen thousand, eight hundred seventy-six".