20541013 has 2 divisors, whose sum is σ = 20541014. Its totient is φ = 20541012.

The previous prime is 20540999. The next prime is 20541023. The reversal of 20541013 is 31014502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 1119364 = 4407^2 + 1058^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541013 - 2¹⁷ = 20409941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20541023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270506 + 10270507.

It is an arithmetic number, because the mean of its divisors is an integer number (10270507).

Almost surely, 2^20541013 is an apocalyptic number.

It is an amenable number.

20541013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541013 is an equidigital number, since it uses as much as digits as its factorization.

20541013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20541013 is about 4532.2194342287. The cubic root of 20541013 is about 273.8675768013.

Adding to 20541013 its reverse (31014502), we get a palindrome (51555515).

The spelling of 20541013 in words is "twenty million, five hundred forty-one thousand, thirteen".