21182371436153 has 2 divisors, whose sum is σ = 21182371436154. Its totient is φ = 21182371436152.

The previous prime is 21182371436143. The next prime is 21182371436173. The reversal of 21182371436153 is 35163417328112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13519174446649 + 7663196989504 = 3676843^2 + 2768248^2 .

It is a cyclic number.

It is not a de Polignac number, because 21182371436153 - 2¹⁶ = 21182371370617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21182371436098 and 21182371436107.

It is not a weakly prime, because it can be changed into another prime (21182371436143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10591185718076 + 10591185718077.

It is an arithmetic number, because the mean of its divisors is an integer number (10591185718077).

Almost surely, 2^{21182371436153} is an apocalyptic number.

It is an amenable number.

21182371436153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21182371436153 is an equidigital number, since it uses as much as digits as its factorization.

21182371436153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The spelling of 21182371436153 in words is "twenty-one trillion, one hundred eighty-two billion, three hundred seventy-one million, four hundred thirty-six thousand, one hundred fifty-three".