19012394939 has 8 divisors (see below), whose sum is σ = 19045925952. Its totient is φ = 18978886080.

The previous prime is 19012394911. The next prime is 19012394971. The reversal of 19012394939 is 93949321091.

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

It is a cyclic number.

It is not a de Polignac number, because 19012394939 - 2⁸ = 19012394683 is a prime.

It is a super-2 number, since 2×19012394939² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19012394239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3127607 + ... + 3133679.

It is an arithmetic number, because the mean of its divisors is an integer number (2380740744).

Almost surely, 2^19012394939 is an apocalyptic number.

19012394939 is a deficient number, since it is larger than the sum of its proper divisors (33531013).

19012394939 is an equidigital number, since it uses as much as digits as its factorization.

19012394939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 19012394939 in words is "nineteen billion, twelve million, three hundred ninety-four thousand, nine hundred thirty-nine".