20354449 has 2 divisors, whose sum is σ = 20354450. Its totient is φ = 20354448.

The previous prime is 20354441. The next prime is 20354479. The reversal of 20354449 is 94445302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17139600 + 3214849 = 4140^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 20354449 - 2³ = 20354441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20354449.

It is not a weakly prime, because it can be changed into another prime (20354441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177224 + 10177225.

It is an arithmetic number, because the mean of its divisors is an integer number (10177225).

Almost surely, 2^20354449 is an apocalyptic number.

It is an amenable number.

20354449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354449 is an equidigital number, since it uses as much as digits as its factorization.

20354449 is an evil number, because the sum of its binary digits is even.

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

The square root of 20354449 is about 4511.5905177664. The cubic root of 20354449 is about 273.0359186506.

The spelling of 20354449 in words is "twenty million, three hundred fifty-four thousand, four hundred forty-nine".