21523145035 has 64 divisors (see below), whose sum is σ = 32412856320. Its totient is φ = 13377853440.

The previous prime is 21523145011. The next prime is 21523145053. The reversal of 21523145035 is 53054132512.

It is not a de Polignac number, because 21523145035 - 2⁹ = 21523144523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21523144988 and 21523145006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8056750 + ... + 8059420.

It is an arithmetic number, because the mean of its divisors is an integer number (506450880).

Almost surely, 2^21523145035 is an apocalyptic number.

21523145035 is a deficient number, since it is larger than the sum of its proper divisors (10889711285).

21523145035 is a wasteful number, since it uses less digits than its factorization.

21523145035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 21523145035 its reverse (53054132512), we get a palindrome (74577277547).

The spelling of 21523145035 in words is "twenty-one billion, five hundred twenty-three million, one hundred forty-five thousand, thirty-five".