20189019 has 8 divisors (see below), whose sum is σ = 26958352. Its totient is φ = 13439520.

The previous prime is 20189011. The next prime is 20189021. The reversal of 20189019 is 91098102.

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

It is not a de Polignac number, because 20189019 - 2³ = 20189011 is a prime.

It is a super-2 number, since 2×20189019² = 815192976364722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2392 + ... + 6789.

It is an arithmetic number, because the mean of its divisors is an integer number (3369794).

Almost surely, 2^20189019 is an apocalyptic number.

20189019 is a deficient number, since it is larger than the sum of its proper divisors (6769333).

20189019 is an equidigital number, since it uses as much as digits as its factorization.

20189019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 20189019 is about 4493.2192245649. The cubic root of 20189019 is about 272.2942092989.

The spelling of 20189019 in words is "twenty million, one hundred eighty-nine thousand, nineteen".