19186819242 has 48 divisors (see below), whose sum is σ = 40859862912. Its totient is φ = 6005194240.

The previous prime is 19186819231. The next prime is 19186819283. The reversal of 19186819242 is 24291868191.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 734518 + ... + 760190.

It is an arithmetic number, because the mean of its divisors is an integer number (851247144).

Almost surely, 2^19186819242 is an apocalyptic number.

19186819242 is an abundant number, since it is smaller than the sum of its proper divisors (21673043670).

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

19186819242 is a wasteful number, since it uses less digits than its factorization.

19186819242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26143 (or 26126 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The spelling of 19186819242 in words is "nineteen billion, one hundred eighty-six million, eight hundred nineteen thousand, two hundred forty-two".