20004349 has 4 divisors (see below), whose sum is σ = 20019520. Its totient is φ = 19989180.

The previous prime is 20004343. The next prime is 20004367. The reversal of 20004349 is 94340002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20004349 - 2⁷ = 20004221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004343) 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, 5397 + ... + 8314.

It is an arithmetic number, because the mean of its divisors is an integer number (5004880).

Almost surely, 2^20004349 is an apocalyptic number.

It is an amenable number.

20004349 is a deficient number, since it is larger than the sum of its proper divisors (15171).

20004349 is a wasteful number, since it uses less digits than its factorization.

20004349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15170.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20004349 is about 4472.6221615513. The cubic root of 20004349 is about 271.4614352372.

The spelling of 20004349 in words is "twenty million, four thousand, three hundred forty-nine".