21532000506 has 16 divisors (see below), whose sum is σ = 43120897824. Its totient is φ = 7167850704.

The previous prime is 21532000481. The next prime is 21532000507. The reversal of 21532000506 is 60500023512.

It is not an unprimeable number, because it can be changed into a prime (21532000507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365780 + ... + 2374863.

It is an arithmetic number, because the mean of its divisors is an integer number (2695056114).

Almost surely, 2^21532000506 is an apocalyptic number.

21532000506 is an abundant number, since it is smaller than the sum of its proper divisors (21588897318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21532000506 is a wasteful number, since it uses less digits than its factorization.

21532000506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741405.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21532000506 in words is "twenty-one billion, five hundred thirty-two million, five hundred six", and thus it is an aban number.