19942509014 has 4 divisors (see below), whose sum is σ = 29913763524. Its totient is φ = 9971254506.

The previous prime is 19942509011. The next prime is 19942509029. The reversal of 19942509014 is 41090524991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41090524991 = 120293 ⋅341587.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19942509011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4985627252 + ... + 4985627255.

It is an arithmetic number, because the mean of its divisors is an integer number (7478440881).

Almost surely, 2^19942509014 is an apocalyptic number.

19942509014 is a deficient number, since it is larger than the sum of its proper divisors (9971254510).

19942509014 is an equidigital number, since it uses as much as digits as its factorization.

19942509014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971254509.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 19942509014 in words is "nineteen billion, nine hundred forty-two million, five hundred nine thousand, fourteen".