19086139 has 4 divisors (see below), whose sum is σ = 19300680. Its totient is φ = 18871600.

The previous prime is 19086103. The next prime is 19086157. The reversal of 19086139 is 93168091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19086139 - 2²¹ = 16988987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19086098 and 19086107.

It is not an unprimeable number, because it can be changed into a prime (19086239) 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, 107137 + ... + 107314.

It is an arithmetic number, because the mean of its divisors is an integer number (4825170).

Almost surely, 2^19086139 is an apocalyptic number.

19086139 is a deficient number, since it is larger than the sum of its proper divisors (214541).

19086139 is an equidigital number, since it uses as much as digits as its factorization.

19086139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214540.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 19086139 is about 4368.7685908045. The cubic root of 19086139 is about 267.2428086703.

The spelling of 19086139 in words is "nineteen million, eighty-six thousand, one hundred thirty-nine".