20344549 has 2 divisors, whose sum is σ = 20344550. Its totient is φ = 20344548.

The previous prime is 20344517. The next prime is 20344559. The reversal of 20344549 is 94544302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 1940449 = 4290^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344549 - 2⁵ = 20344517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20344549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20344559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172274 + 10172275.

It is an arithmetic number, because the mean of its divisors is an integer number (10172275).

Almost surely, 2^20344549 is an apocalyptic number.

It is an amenable number.

20344549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344549 is an equidigital number, since it uses as much as digits as its factorization.

20344549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20344549 is about 4510.4932102820. The cubic root of 20344549 is about 272.9916450546.

It can be divided in two parts, 20 and 344549, that added together give a square (344569 = 587²).

The spelling of 20344549 in words is "twenty million, three hundred forty-four thousand, five hundred forty-nine".