20053507609 has 2 divisors, whose sum is σ = 20053507610. Its totient is φ = 20053507608.

The previous prime is 20053507603. The next prime is 20053507667. The reversal of 20053507609 is 90670535002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13025200384 + 7028307225 = 114128^2 + 83835^2 .

It is a cyclic number.

It is not a de Polignac number, because 20053507609 - 2³ = 20053507601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20053507601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026753804 + 10026753805.

It is an arithmetic number, because the mean of its divisors is an integer number (10026753805).

Almost surely, 2^20053507609 is an apocalyptic number.

It is an amenable number.

20053507609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20053507609 is an equidigital number, since it uses as much as digits as its factorization.

20053507609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 20053507609 in words is "twenty billion, fifty-three million, five hundred seven thousand, six hundred nine".