19042521436 has 24 divisors (see below), whose sum is σ = 33387961040. Its totient is φ = 9503125632.

The previous prime is 19042521397. The next prime is 19042521437. The reversal of 19042521436 is 63412524091.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19042521395 and 19042521404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19042521437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7033195 + ... + 7035901.

Almost surely, 2^19042521436 is an apocalyptic number.

It is an amenable number.

19042521436 is a deficient number, since it is larger than the sum of its proper divisors (14345439604).

19042521436 is a wasteful number, since it uses less digits than its factorization.

19042521436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413 (or 5411 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 19042521436 in words is "nineteen billion, forty-two million, five hundred twenty-one thousand, four hundred thirty-six".