20734379 has 4 divisors (see below), whose sum is σ = 21175584. Its totient is φ = 20293176.

The previous prime is 20734369. The next prime is 20734403. The reversal of 20734379 is 97343702.

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 20734379 - 2²⁰ = 19685803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20734309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220532 + ... + 220625.

It is an arithmetic number, because the mean of its divisors is an integer number (5293896).

Almost surely, 2^20734379 is an apocalyptic number.

20734379 is a deficient number, since it is larger than the sum of its proper divisors (441205).

20734379 is an equidigital number, since it uses as much as digits as its factorization.

20734379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441204.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 20734379 is about 4553.5018392442. The cubic root of 20734379 is about 274.7242591459.

The spelling of 20734379 in words is "twenty million, seven hundred thirty-four thousand, three hundred seventy-nine".