20394419 has 4 divisors (see below), whose sum is σ = 20412144. Its totient is φ = 20376696.

The previous prime is 20394401. The next prime is 20394443. The reversal of 20394419 is 91449302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20394419 - 2¹² = 20390323 is a prime.

It is a super-2 number, since 2×20394419² = 831864652695122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20394449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7007 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (5103036).

Almost surely, 2^20394419 is an apocalyptic number.

20394419 is a deficient number, since it is larger than the sum of its proper divisors (17725).

20394419 is a wasteful number, since it uses less digits than its factorization.

20394419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17724.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20394419 is about 4516.0180469081. The cubic root of 20394419 is about 273.2145218642.

The spelling of 20394419 in words is "twenty million, three hundred ninety-four thousand, four hundred nineteen".