20638683849053 has 2 divisors, whose sum is σ = 20638683849054. Its totient is φ = 20638683849052.

The previous prime is 20638683849013. The next prime is 20638683849103. The reversal of 20638683849053 is 35094838683602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20446557673369 + 192126175684 = 4521787^2 + 438322^2 .

It is a cyclic number.

It is not a de Polignac number, because 20638683849053 - 2¹² = 20638683844957 is a prime.

It is a super-2 number, since 2×20638683849053² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20638683849013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10319341924526 + 10319341924527.

It is an arithmetic number, because the mean of its divisors is an integer number (10319341924527).

Almost surely, 2^{20638683849053} is an apocalyptic number.

It is an amenable number.

20638683849053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20638683849053 is an equidigital number, since it uses as much as digits as its factorization.

20638683849053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179159040, while the sum is 65.

The spelling of 20638683849053 in words is "twenty trillion, six hundred thirty-eight billion, six hundred eighty-three million, eight hundred forty-nine thousand, fifty-three".