19478386242 has 48 divisors (see below), whose sum is σ = 51069388032. Its totient is φ = 5237884800.

The previous prime is 19478386241. The next prime is 19478386247. The reversal of 19478386242 is 24268387491.

19478386242 is a `hidden beast` number, since 1 + 9 + 4 + 7 + 8 + 3 + 8 + 624 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (19478386241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4544634 + ... + 4548917.

It is an arithmetic number, because the mean of its divisors is an integer number (1063945584).

Almost surely, 2^19478386242 is an apocalyptic number.

19478386242 is an abundant number, since it is smaller than the sum of its proper divisors (31591001790).

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

19478386242 is a wasteful number, since it uses less digits than its factorization.

19478386242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093583 (or 9093580 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 19478386242 in words is "nineteen billion, four hundred seventy-eight million, three hundred eighty-six thousand, two hundred forty-two".