20439119 has 4 divisors (see below), whose sum is σ = 20449944. Its totient is φ = 20428296.

The previous prime is 20439103. The next prime is 20439121. The reversal of 20439119 is 91193402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20439119 - 2⁴ = 20439103 is a prime.

It is a super-2 number, since 2×20439119² = 835515170992322, 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 = 20439091 and 20439100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20439149) 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, 1757 + ... + 6630.

It is an arithmetic number, because the mean of its divisors is an integer number (5112486).

Almost surely, 2^20439119 is an apocalyptic number.

20439119 is a deficient number, since it is larger than the sum of its proper divisors (10825).

20439119 is an equidigital number, since it uses as much as digits as its factorization.

20439119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20439119 is about 4520.9643882694. The cubic root of 20439119 is about 273.4139845617.

The spelling of 20439119 in words is "twenty million, four hundred thirty-nine thousand, one hundred nineteen".