20416019 has 8 divisors (see below), whose sum is σ = 22942752. Its totient is φ = 18025920.

The previous prime is 20415961. The next prime is 20416021. The reversal of 20416019 is 91061402.

It is a happy number.

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 20416019 - 2²⁰ = 19367443 is a prime.

It is a super-2 number, since 2×20416019² = 833627663616722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20415985 and 20416003.

It is not an unprimeable number, because it can be changed into a prime (20436019) 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, 33842 + ... + 34439.

It is an arithmetic number, because the mean of its divisors is an integer number (2867844).

Almost surely, 2^20416019 is an apocalyptic number.

20416019 is a deficient number, since it is larger than the sum of its proper divisors (2526733).

20416019 is a wasteful number, since it uses less digits than its factorization.

20416019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68317.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20416019 is about 4518.4089013723. The cubic root of 20416019 is about 273.3109428747.

The spelling of 20416019 in words is "twenty million, four hundred sixteen thousand, nineteen".