21152404346153 has 2 divisors, whose sum is σ = 21152404346154. Its totient is φ = 21152404346152.

The previous prime is 21152404346141. The next prime is 21152404346219. The reversal of 21152404346153 is 35164340425112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21152162325904 + 242020249 = 4599148^2 + 15557^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152404346153 - 2⁴ = 21152404346137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21152404346153.

It is not a weakly prime, because it can be changed into another prime (21152404346653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576202173076 + 10576202173077.

It is an arithmetic number, because the mean of its divisors is an integer number (10576202173077).

Almost surely, 2^{21152404346153} is an apocalyptic number.

It is an amenable number.

21152404346153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152404346153 is an equidigital number, since it uses as much as digits as its factorization.

21152404346153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 21152404346153 in words is "twenty-one trillion, one hundred fifty-two billion, four hundred four million, three hundred forty-six thousand, one hundred fifty-three".