20079719 has 4 divisors (see below), whose sum is σ = 21905160. Its totient is φ = 18254280.

The previous prime is 20079701. The next prime is 20079721. The reversal of 20079719 is 91797002.

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

It is not a de Polignac number, because 20079719 - 2²⁴ = 3302503 is a prime.

It is a super-2 number, since 2×20079719² = 806390230237922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20079779) 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, 912704 + ... + 912725.

It is an arithmetic number, because the mean of its divisors is an integer number (5476290).

Almost surely, 2^20079719 is an apocalyptic number.

20079719 is a deficient number, since it is larger than the sum of its proper divisors (1825441).

20079719 is a wasteful number, since it uses less digits than its factorization.

20079719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825440.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 20079719 is about 4481.0399462625. The cubic root of 20079719 is about 271.8019346353.

The spelling of 20079719 in words is "twenty million, seventy-nine thousand, seven hundred nineteen".