1911973242 has 24 divisors (see below), whose sum is σ = 3914966304. Its totient is φ = 622499304.

The previous prime is 1911973237. The next prime is 1911973253. The reversal of 1911973242 is 2423791191.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1911973242.

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 11 ways as a sum of consecutive naturals, for example, 75078 + ... + 97265.

It is an arithmetic number, because the mean of its divisors is an integer number (163123596).

Almost surely, 2^1911973242 is an apocalyptic number.

1911973242 is an abundant number, since it is smaller than the sum of its proper divisors (2002993062).

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

1911973242 is a wasteful number, since it uses less digits than its factorization.

1911973242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172434 (or 172391 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 1911973242 is about 43726.1162464722. The cubic root of 1911973242 is about 1241.1585690156.

The spelling of 1911973242 in words is "one billion, nine hundred eleven million, nine hundred seventy-three thousand, two hundred forty-two".