21080289053 has 2 divisors, whose sum is σ = 21080289054. Its totient is φ = 21080289052.

The previous prime is 21080289019. The next prime is 21080289071. The reversal of 21080289053 is 35098208012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20289723364 + 790565689 = 142442^2 + 28117^2 .

It is a cyclic number.

It is not a de Polignac number, because 21080289053 - 2⁸ = 21080288797 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21080288998 and 21080289016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21080286053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10540144526 + 10540144527.

It is an arithmetic number, because the mean of its divisors is an integer number (10540144527).

Almost surely, 2^21080289053 is an apocalyptic number.

It is an amenable number.

21080289053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21080289053 is an equidigital number, since it uses as much as digits as its factorization.

21080289053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 21080289053 in words is "twenty-one billion, eighty million, two hundred eighty-nine thousand, fifty-three".