20344313 has 4 divisors (see below), whose sum is σ = 22193808. Its totient is φ = 18494820.

The previous prime is 20344309. The next prime is 20344319. The reversal of 20344313 is 31344302.

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 20344313 - 2² = 20344309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344319) 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, 924731 + ... + 924752.

It is an arithmetic number, because the mean of its divisors is an integer number (5548452).

Almost surely, 2^20344313 is an apocalyptic number.

It is an amenable number.

20344313 is a deficient number, since it is larger than the sum of its proper divisors (1849495).

20344313 is a wasteful number, since it uses less digits than its factorization.

20344313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849494.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20344313 is about 4510.4670489873. The cubic root of 20344313 is about 272.9905894684.

Adding to 20344313 its reverse (31344302), we get a palindrome (51688615).

The spelling of 20344313 in words is "twenty million, three hundred forty-four thousand, three hundred thirteen".