20344613 has 2 divisors, whose sum is σ = 20344614. Its totient is φ = 20344612.

The previous prime is 20344607. The next prime is 20344619. The reversal of 20344613 is 31644302.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20344607) and next prime (20344619).

It can be written as a sum of positive squares in only one way, i.e., 12061729 + 8282884 = 3473^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344613 - 2⁶ = 20344549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172306 + 10172307.

It is an arithmetic number, because the mean of its divisors is an integer number (10172307).

Almost surely, 2^20344613 is an apocalyptic number.

It is an amenable number.

20344613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344613 is an equidigital number, since it uses as much as digits as its factorization.

20344613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20344613 is about 4510.5003048442. The cubic root of 20344613 is about 272.9919313139.

Adding to 20344613 its reverse (31644302), we get a palindrome (51988915).

The spelling of 20344613 in words is "twenty million, three hundred forty-four thousand, six hundred thirteen".