20109019 has 8 divisors (see below), whose sum is σ = 23603168. Its totient is φ = 16770240.

The previous prime is 20109017. The next prime is 20109041. The reversal of 20109019 is 91090102.

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

It is a cyclic number.

It is not a de Polignac number, because 20109019 - 2¹ = 20109017 is a prime.

It is a super-2 number, since 2×20109019² = 808745290284722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20109017) 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, 38562 + ... + 39079.

It is an arithmetic number, because the mean of its divisors is an integer number (2950396).

Almost surely, 2^20109019 is an apocalyptic number.

20109019 is a deficient number, since it is larger than the sum of its proper divisors (3494149).

20109019 is an equidigital number, since it uses as much as digits as its factorization.

20109019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77685.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 20109019 is about 4484.3080848666. The cubic root of 20109019 is about 271.9340733748.

The spelling of 20109019 in words is "twenty million, one hundred nine thousand, nineteen".