21152450535 has 32 divisors (see below), whose sum is σ = 34070464512. Its totient is φ = 11206041600.

The previous prime is 21152450509. The next prime is 21152450551. The reversal of 21152450535 is 53505425112.

It is not a de Polignac number, because 21152450535 - 2⁸ = 21152450279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21152450496 and 21152450505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1407310 + ... + 1422260.

It is an arithmetic number, because the mean of its divisors is an integer number (1064702016).

Almost surely, 2^21152450535 is an apocalyptic number.

21152450535 is a deficient number, since it is larger than the sum of its proper divisors (12918013977).

21152450535 is a wasteful number, since it uses less digits than its factorization.

21152450535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15583.

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 21152450535 its reverse (53505425112), we get a palindrome (74657875647).

The spelling of 21152450535 in words is "twenty-one billion, one hundred fifty-two million, four hundred fifty thousand, five hundred thirty-five".