21152530035977 has 2 divisors, whose sum is σ = 21152530035978. Its totient is φ = 21152530035976.

The previous prime is 21152530035941. The next prime is 21152530036031. The reversal of 21152530035977 is 77953003525112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13824334535881 + 7328195500096 = 3718109^2 + 2707064^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152530035977 - 2¹⁶ = 21152529970441 is a prime.

It is not a weakly prime, because it can be changed into another prime (21152530035677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576265017988 + 10576265017989.

It is an arithmetic number, because the mean of its divisors is an integer number (10576265017989).

Almost surely, 2^{21152530035977} is an apocalyptic number.

It is an amenable number.

21152530035977 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152530035977 is an equidigital number, since it uses as much as digits as its factorization.

21152530035977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1984500, while the sum is 50.

The spelling of 21152530035977 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred thirty million, thirty-five thousand, nine hundred seventy-seven".