19442878652 has 12 divisors (see below), whose sum is σ = 34455734880. Its totient is φ = 9598382976.

The previous prime is 19442878613. The next prime is 19442878669. The reversal of 19442878652 is 25687824491.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30763733 + ... + 30764364.

It is an arithmetic number, because the mean of its divisors is an integer number (2871311240).

Almost surely, 2^19442878652 is an apocalyptic number.

It is an amenable number.

19442878652 is a deficient number, since it is larger than the sum of its proper divisors (15012856228).

19442878652 is a wasteful number, since it uses less digits than its factorization.

19442878652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61528180 (or 61528178 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 19442878652 in words is "nineteen billion, four hundred forty-two million, eight hundred seventy-eight thousand, six hundred fifty-two".