20900484013 has 2 divisors, whose sum is σ = 20900484014. Its totient is φ = 20900484012.

The previous prime is 20900483977. The next prime is 20900484037. The reversal of 20900484013 is 31048400902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20869269444 + 31214569 = 144462^2 + 5587^2 .

It is a cyclic number.

It is not a de Polignac number, because 20900484013 - 2¹³ = 20900475821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20900484083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450242006 + 10450242007.

It is an arithmetic number, because the mean of its divisors is an integer number (10450242007).

Almost surely, 2^20900484013 is an apocalyptic number.

It is an amenable number.

20900484013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20900484013 is an equidigital number, since it uses as much as digits as its factorization.

20900484013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 20900484013 its reverse (31048400902), we get a palindrome (51948884915).

The spelling of 20900484013 in words is "twenty billion, nine hundred million, four hundred eighty-four thousand, thirteen".