19442544605 has 16 divisors (see below), whose sum is σ = 26072843328. Its totient is φ = 13795152000.

The previous prime is 19442544577. The next prime is 19442544613. The reversal of 19442544605 is 50644524491.

It is a happy number.

It is not a de Polignac number, because 19442544605 - 2⁸ = 19442544349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4308731 + ... + 4313240.

It is an arithmetic number, because the mean of its divisors is an integer number (1629552708).

Almost surely, 2^19442544605 is an apocalyptic number.

It is an amenable number.

19442544605 is a deficient number, since it is larger than the sum of its proper divisors (6630298723).

19442544605 is a wasteful number, since it uses less digits than its factorization.

19442544605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8622028.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 19442544605 in words is "nineteen billion, four hundred forty-two million, five hundred forty-four thousand, six hundred five".