19440509942 has 8 divisors (see below), whose sum is σ = 33326588496. Its totient is φ = 8331647112.

The previous prime is 19440509941. The next prime is 19440509947. The reversal of 19440509942 is 24990504491.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19440509941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694303913 + ... + 694303940.

It is an arithmetic number, because the mean of its divisors is an integer number (4165823562).

Almost surely, 2^19440509942 is an apocalyptic number.

19440509942 is a deficient number, since it is larger than the sum of its proper divisors (13886078554).

19440509942 is a wasteful number, since it uses less digits than its factorization.

19440509942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388607862.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 19440509942 in words is "nineteen billion, four hundred forty million, five hundred nine thousand, nine hundred forty-two".