20536121003 has 2 divisors, whose sum is σ = 20536121004. Its totient is φ = 20536121002.

The previous prime is 20536120967. The next prime is 20536121033. The reversal of 20536121003 is 30012163502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20536121003 - 2¹² = 20536116907 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20536121003.

It is not a weakly prime, because it can be changed into another prime (20536121033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268060501 + 10268060502.

It is an arithmetic number, because the mean of its divisors is an integer number (10268060502).

Almost surely, 2^20536121003 is an apocalyptic number.

20536121003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20536121003 is an equidigital number, since it uses as much as digits as its factorization.

20536121003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 20536121003 its reverse (30012163502), we get a palindrome (50548284505).

The spelling of 20536121003 in words is "twenty billion, five hundred thirty-six million, one hundred twenty-one thousand, three".