19394362139 has 8 divisors (see below), whose sum is σ = 19498839120. Its totient is φ = 19289926656.

The previous prime is 19394362121. The next prime is 19394362153. The reversal of 19394362139 is 93126349391.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19394362139 is a prime.

It is a super-2 number, since 2×19394362139² (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 (19394362159) 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, 1539464 + ... + 1552010.

It is an arithmetic number, because the mean of its divisors is an integer number (2437354890).

Almost surely, 2^19394362139 is an apocalyptic number.

19394362139 is a deficient number, since it is larger than the sum of its proper divisors (104476981).

19394362139 is a wasteful number, since it uses less digits than its factorization.

19394362139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20749.

The product of its digits is 944784, while the sum is 50.

The spelling of 19394362139 in words is "nineteen billion, three hundred ninety-four million, three hundred sixty-two thousand, one hundred thirty-nine".