19045863444 has 48 divisors (see below), whose sum is σ = 44742519360. Its totient is φ = 6305506560.

The previous prime is 19045863443. The next prime is 19045863457. The reversal of 19045863444 is 44436854091.

It is a happy number.

It is a super-2 number, since 2×19045863444² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19045863393 and 19045863402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19045863443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4772602 + ... + 4776590.

It is an arithmetic number, because the mean of its divisors is an integer number (932135820).

Almost surely, 2^19045863444 is an apocalyptic number.

It is an amenable number.

19045863444 is an abundant number, since it is smaller than the sum of its proper divisors (25696655916).

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

19045863444 is a wasteful number, since it uses less digits than its factorization.

19045863444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 19045863444 in words is "nineteen billion, forty-five million, eight hundred sixty-three thousand, four hundred forty-four".