21471604110053 has 2 divisors, whose sum is σ = 21471604110054. Its totient is φ = 21471604110052.

The previous prime is 21471604110049. The next prime is 21471604110227. The reversal of 21471604110053 is 35001140617412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20945432317924 + 526171792129 = 4576618^2 + 725377^2 .

It is a cyclic number.

It is not a de Polignac number, because 21471604110053 - 2² = 21471604110049 is a prime.

It is a super-2 number, since 2×21471604110053² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21471604109995 and 21471604110022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21471604110043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735802055026 + 10735802055027.

It is an arithmetic number, because the mean of its divisors is an integer number (10735802055027).

Almost surely, 2^{21471604110053} is an apocalyptic number.

It is an amenable number.

21471604110053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21471604110053 is an equidigital number, since it uses as much as digits as its factorization.

21471604110053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 21471604110053 its reverse (35001140617412), we get a palindrome (56472744727465).

The spelling of 21471604110053 in words is "twenty-one trillion, four hundred seventy-one billion, six hundred four million, one hundred ten thousand, fifty-three".