21532000505 has 16 divisors (see below), whose sum is σ = 28547800704. Its totient is φ = 15507444480.

The previous prime is 21532000481. The next prime is 21532000507. The reversal of 21532000505 is 50500023512.

It is not a de Polignac number, because 21532000505 - 2¹⁶ = 21531934969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 5504951 + ... + 5508860.

It is an arithmetic number, because the mean of its divisors is an integer number (1784237544).

Almost surely, 2^21532000505 is an apocalyptic number.

It is an amenable number.

21532000505 is a deficient number, since it is larger than the sum of its proper divisors (7015800199).

21532000505 is a wasteful number, since it uses less digits than its factorization.

21532000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11013856.

The product of its (nonzero) digits is 1500, while the sum is 23.

The spelling of 21532000505 in words is "twenty-one billion, five hundred thirty-two million, five hundred five", and thus it is an aban number.