20504053 has 2 divisors, whose sum is σ = 20504054. Its totient is φ = 20504052.

The previous prime is 20504009. The next prime is 20504101. The reversal of 20504053 is 35040502.

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., 19298449 + 1205604 = 4393^2 + 1098^2 .

It is a cyclic number.

It is not a de Polignac number, because 20504053 - 2¹³ = 20495861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20504053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20504153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10252026 + 10252027.

It is an arithmetic number, because the mean of its divisors is an integer number (10252027).

Almost surely, 2^20504053 is an apocalyptic number.

It is an amenable number.

20504053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20504053 is an equidigital number, since it uses as much as digits as its factorization.

20504053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20504053 is about 4528.1401259237. The cubic root of 20504053 is about 273.7032190725.

Adding to 20504053 its reverse (35040502), we get a palindrome (55544555).

The spelling of 20504053 in words is "twenty million, five hundred four thousand, fifty-three".