19311017242 has 8 divisors (see below), whose sum is σ = 31599846432. Its totient is φ = 8777735100.

The previous prime is 19311017237. The next prime is 19311017249. The reversal of 19311017242 is 24271011391.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (19311017249) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 438886734 + ... + 438886777.

It is an arithmetic number, because the mean of its divisors is an integer number (3949980804).

Almost surely, 2^19311017242 is an apocalyptic number.

19311017242 is a deficient number, since it is larger than the sum of its proper divisors (12288829190).

19311017242 is a wasteful number, since it uses less digits than its factorization.

19311017242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877773524.

The product of its (nonzero) digits is 3024, while the sum is 31.

The spelling of 19311017242 in words is "nineteen billion, three hundred eleven million, seventeen thousand, two hundred forty-two".