21532134235 has 8 divisors (see below), whose sum is σ = 25848390240. Its totient is φ = 17219154624.

The previous prime is 21532134187. The next prime is 21532134269. The reversal of 21532134235 is 53243123512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21532134235 - 2²¹ = 21530037083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21532134197 and 21532134206.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 804615 + ... + 830944.

It is an arithmetic number, because the mean of its divisors is an integer number (3231048780).

Almost surely, 2^21532134235 is an apocalyptic number.

21532134235 is a deficient number, since it is larger than the sum of its proper divisors (4316256005).

21532134235 is a wasteful number, since it uses less digits than its factorization.

21532134235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638197.

The product of its digits is 21600, while the sum is 31.

Adding to 21532134235 its reverse (53243123512), we get a palindrome (74775257747).

The spelling of 21532134235 in words is "twenty-one billion, five hundred thirty-two million, one hundred thirty-four thousand, two hundred thirty-five".