20544473 has 2 divisors, whose sum is σ = 20544474. Its totient is φ = 20544472.

The previous prime is 20544439. The next prime is 20544481. The reversal of 20544473 is 37444502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 7382089 = 3628^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 20544473 - 2¹⁶ = 20478937 is a prime.

It is not a weakly prime, because it can be changed into another prime (20564473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272236 + 10272237.

It is an arithmetic number, because the mean of its divisors is an integer number (10272237).

Almost surely, 2^20544473 is an apocalyptic number.

It is an amenable number.

20544473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20544473 is an equidigital number, since it uses as much as digits as its factorization.

20544473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 20544473 is about 4532.6011295944. The cubic root of 20544473 is about 273.8829530085.

Adding to 20544473 its sum of digits (29), we get a palindrome (20544502).

Adding to 20544473 its reverse (37444502), we get a palindrome (57988975).

The spelling of 20544473 in words is "twenty million, five hundred forty-four thousand, four hundred seventy-three".