19013939 has 16 divisors (see below), whose sum is σ = 24012288. Its totient is φ = 14669952.

The previous prime is 19013933. The next prime is 19013947. The reversal of 19013939 is 93931091.

19013939 = T₂ + T₃ + ... + T₄₈₄.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-19013939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19013899 and 19013908.

It is not an unprimeable number, because it can be changed into a prime (19013933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 737 + ... + 6210.

It is an arithmetic number, because the mean of its divisors is an integer number (1500768).

Almost surely, 2^19013939 is an apocalyptic number.

19013939 is a deficient number, since it is larger than the sum of its proper divisors (4998349).

19013939 is a wasteful number, since it uses less digits than its factorization.

19013939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 19013939 is about 4360.4975633521. The cubic root of 19013939 is about 266.9054030450.

The spelling of 19013939 in words is "nineteen million, thirteen thousand, nine hundred thirty-nine".