19055814642 has 18 divisors (see below), whose sum is σ = 41288867373. Its totient is φ = 6351742992.

The previous prime is 19055814623. The next prime is 19055814649. The reversal of 19055814642 is 24641855091.

19055814642 is a `hidden beast` number, since 1 + 9 + 0 + 5 + 581 + 4 + 64 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10571746761 + 8484067881 = 102819^2 + 92109^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97611.

It is not an unprimeable number, because it can be changed into a prime (19055814649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 569398 + ... + 601934.

Almost surely, 2^19055814642 is an apocalyptic number.

19055814642 is an abundant number, since it is smaller than the sum of its proper divisors (22233052731).

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

19055814642 is an frugal number, since it uses more digits than its factorization.

19055814642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65082 (or 32542 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 19055814642 in words is "nineteen billion, fifty-five million, eight hundred fourteen thousand, six hundred forty-two".