21532000208 has 20 divisors (see below), whose sum is σ = 42605874240. Its totient is φ = 10536935904.

The previous prime is 21532000207. The next prime is 21532000219. The reversal of 21532000208 is 80200023512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532000201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14315738 + ... + 14317241.

It is an arithmetic number, because the mean of its divisors is an integer number (2130293712).

Almost surely, 2^21532000208 is an apocalyptic number.

It is an amenable number.

21532000208 is a deficient number, since it is larger than the sum of its proper divisors (21073874032).

21532000208 is a wasteful number, since it uses less digits than its factorization.

21532000208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28633034 (or 28633028 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 21532000208 in words is "twenty-one billion, five hundred thirty-two million, two hundred eight", and thus it is an aban number.