20541449 has 2 divisors, whose sum is σ = 20541450. Its totient is φ = 20541448.

The previous prime is 20541431. The next prime is 20541497. The reversal of 20541449 is 94414502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18215824 + 2325625 = 4268^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541449 - 2¹² = 20537353 is a prime.

It is a super-2 number, since 2×20541449² = 843902254039202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20541419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270724 + 10270725.

It is an arithmetic number, because the mean of its divisors is an integer number (10270725).

Almost surely, 2^20541449 is an apocalyptic number.

It is an amenable number.

20541449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541449 is an equidigital number, since it uses as much as digits as its factorization.

20541449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20541449 is about 4532.2675340275. The cubic root of 20541449 is about 273.8695144763.

The spelling of 20541449 in words is "twenty million, five hundred forty-one thousand, four hundred forty-nine".