21532004230 has 32 divisors (see below), whose sum is σ = 42655219488. Its totient is φ = 7760524800.

The previous prime is 21532004213. The next prime is 21532004233. The reversal of 21532004230 is 3240023512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532004233) 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, 853701 + ... + 878560.

It is an arithmetic number, because the mean of its divisors is an integer number (1332975609).

Almost surely, 2^21532004230 is an apocalyptic number.

21532004230 is a deficient number, since it is larger than the sum of its proper divisors (21123215258).

21532004230 is a wasteful number, since it uses less digits than its factorization.

21532004230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732392.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 21532004230 its reverse (3240023512), we get a palindrome (24772027742).

The spelling of 21532004230 in words is "twenty-one billion, five hundred thirty-two million, four thousand, two hundred thirty".