21030213532 has 12 divisors (see below), whose sum is σ = 36837964800. Its totient is φ = 10505080736.

The previous prime is 21030213521. The next prime is 21030213559. The reversal of 21030213532 is 23531203012.

It is a congruent number.

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, 2501788 + ... + 2510179.

It is an arithmetic number, because the mean of its divisors is an integer number (3069830400).

Almost surely, 2^21030213532 is an apocalyptic number.

It is an amenable number.

21030213532 is a deficient number, since it is larger than the sum of its proper divisors (15807751268).

21030213532 is a wasteful number, since it uses less digits than its factorization.

21030213532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013020 (or 5013018 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21030213532 its reverse (23531203012), we get a palindrome (44561416544).

The spelling of 21030213532 in words is "twenty-one billion, thirty million, two hundred thirteen thousand, five hundred thirty-two".