21636148528 has 20 divisors (see below), whose sum is σ = 41932012608. Its totient is φ = 10814984000.

The previous prime is 21636148493. The next prime is 21636148531. The reversal of 21636148528 is 82584163612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134848 + ... + 247903.

Almost surely, 2^21636148528 is an apocalyptic number.

It is an amenable number.

21636148528 is a deficient number, since it is larger than the sum of its proper divisors (20295864080).

21636148528 is a wasteful number, since it uses less digits than its factorization.

21636148528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386292 (or 386286 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 21636148528 in words is "twenty-one billion, six hundred thirty-six million, one hundred forty-eight thousand, five hundred twenty-eight".