20544929 has 2 divisors, whose sum is σ = 20544930. Its totient is φ = 20544928.

The previous prime is 20544899. The next prime is 20544949. The reversal of 20544929 is 92944502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17447329 + 3097600 = 4177^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 20544929 - 2²⁰ = 19496353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20544949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272464 + 10272465.

It is an arithmetic number, because the mean of its divisors is an integer number (10272465).

Almost surely, 2^20544929 is an apocalyptic number.

It is an amenable number.

20544929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20544929 is an equidigital number, since it uses as much as digits as its factorization.

20544929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20544929 is about 4532.6514315575. The cubic root of 20544929 is about 273.8849793394.

The spelling of 20544929 in words is "twenty million, five hundred forty-four thousand, nine hundred twenty-nine".