2019423844 has 9 divisors (see below), whose sum is σ = 3534149017. Its totient is φ = 1009666984.

The previous prime is 2019423841. The next prime is 2019423877. The reversal of 2019423844 is 4483249102.

The square root of 2019423844 is 44938.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1533662244 + 485761600 = 39162^2 + 22040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2019423841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 78642 + ... + 101110.

Almost surely, 2^2019423844 is an apocalyptic number.

2019423844 is the 44938-th square number.

It is an amenable number.

2019423844 is a deficient number, since it is larger than the sum of its proper divisors (1514725173).

2019423844 is an frugal number, since it uses more digits than its factorization.

2019423844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44942 (or 22471 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The cubic root of 2019423844 is about 1263.9866681617.

The spelling of 2019423844 in words is "two billion, nineteen million, four hundred twenty-three thousand, eight hundred forty-four".