21532000204 has 48 divisors (see below), whose sum is σ = 45018973440. Its totient is φ = 8881266240.

The previous prime is 21532000201. The next prime is 21532000207. The reversal of 21532000204 is 40200023512.

It is an interprime number because it is at equal distance from previous prime (21532000201) and next prime (21532000207).

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285264 + ... + 352759.

It is an arithmetic number, because the mean of its divisors is an integer number (937895280).

Almost surely, 2^21532000204 is an apocalyptic number.

It is an amenable number.

21532000204 is an abundant number, since it is smaller than the sum of its proper divisors (23486973236).

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

21532000204 is a wasteful number, since it uses less digits than its factorization.

21532000204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638110 (or 638108 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 21532000204 its reverse (40200023512), we get a palindrome (61732023716).

The spelling of 21532000204 in words is "twenty-one billion, five hundred thirty-two million, two hundred four", and thus it is an aban number.