20054549 has 2 divisors, whose sum is σ = 20054550. Its totient is φ = 20054548.

The previous prime is 20054537. The next prime is 20054581. The reversal of 20054549 is 94545002.

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., 10176100 + 9878449 = 3190^2 + 3143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20054549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20054599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027274 + 10027275.

It is an arithmetic number, because the mean of its divisors is an integer number (10027275).

Almost surely, 2^20054549 is an apocalyptic number.

It is an amenable number.

20054549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20054549 is an equidigital number, since it uses as much as digits as its factorization.

20054549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20054549 is about 4478.2305657480. The cubic root of 20054549 is about 271.6883189153.

The spelling of 20054549 in words is "twenty million, fifty-four thousand, five hundred forty-nine".