20180019 has 8 divisors (see below), whose sum is σ = 26952640. Its totient is φ = 13430376.

The previous prime is 20180009. The next prime is 20180051. The reversal of 20180019 is 91008102.

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

It is not a de Polignac number, because 20180019 - 2⁵ = 20179987 is a prime.

It is a super-2 number, since 2×20180019² = 814466333680722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20179977 and 20180004.

It is not an unprimeable number, because it can be changed into a prime (20180009) 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, 3577 + ... + 7290.

It is an arithmetic number, because the mean of its divisors is an integer number (3369080).

Almost surely, 2^20180019 is an apocalyptic number.

20180019 is a deficient number, since it is larger than the sum of its proper divisors (6772621).

20180019 is a wasteful number, since it uses less digits than its factorization.

20180019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11489.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 20180019 is about 4492.2176038122. The cubic root of 20180019 is about 272.2537415553.

The spelling of 20180019 in words is "twenty million, one hundred eighty thousand, nineteen".