20621001053 has 2 divisors, whose sum is σ = 20621001054. Its totient is φ = 20621001052.

The previous prime is 20621001043. The next prime is 20621001077. The reversal of 20621001053 is 35010012602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18503344729 + 2117656324 = 136027^2 + 46018^2 .

It is a cyclic number.

It is not a de Polignac number, because 20621001053 - 2⁶ = 20621000989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20621001013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310500526 + 10310500527.

It is an arithmetic number, because the mean of its divisors is an integer number (10310500527).

Almost surely, 2^20621001053 is an apocalyptic number.

It is an amenable number.

20621001053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20621001053 is an equidigital number, since it uses as much as digits as its factorization.

20621001053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 20621001053 its reverse (35010012602), we get a palindrome (55631013655).

The spelling of 20621001053 in words is "twenty billion, six hundred twenty-one million, one thousand, fifty-three".