20363449 has 2 divisors, whose sum is σ = 20363450. Its totient is φ = 20363448.

The previous prime is 20363443. The next prime is 20363461. The reversal of 20363449 is 94436302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 176400 = 4493^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363449 - 2¹¹ = 20361401 is a prime.

It is equal to p_1292188 and since 20363449 and 1292188 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20363449.

It is not a weakly prime, because it can be changed into another prime (20363443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181724 + 10181725.

It is an arithmetic number, because the mean of its divisors is an integer number (10181725).

Almost surely, 2^20363449 is an apocalyptic number.

It is an amenable number.

20363449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363449 is an equidigital number, since it uses as much as digits as its factorization.

20363449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20363449 is about 4512.5878384803. The cubic root of 20363449 is about 273.0761549183.

The spelling of 20363449 in words is "twenty million, three hundred sixty-three thousand, four hundred forty-nine".