19139019 has 8 divisors (see below), whose sum is σ = 25899840. Its totient is φ = 12568776.

The previous prime is 19139017. The next prime is 19139039. The reversal of 19139019 is 91093191.

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

It is not a de Polignac number, because 19139019 - 2¹ = 19139017 is a prime.

It is a super-2 number, since 2×19139019² = 732604096564722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19139017) 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, 47409 + ... + 47810.

It is an arithmetic number, because the mean of its divisors is an integer number (3237480).

Almost surely, 2^19139019 is an apocalyptic number.

19139019 is a deficient number, since it is larger than the sum of its proper divisors (6760821).

19139019 is an equidigital number, since it uses as much as digits as its factorization.

19139019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95289.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 19139019 is about 4374.8164532926. The cubic root of 19139019 is about 267.4893884631.

The spelling of 19139019 in words is "nineteen million, one hundred thirty-nine thousand, nineteen".