21323520235 has 8 divisors (see below), whose sum is σ = 25875732960. Its totient is φ = 16867143744.

The previous prime is 21323520187. The next prime is 21323520259. The reversal of 21323520235 is 53202532312.

It is a happy number.

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 21323520235 - 2¹⁵ = 21323487467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23958567 + ... + 23959456.

It is an arithmetic number, because the mean of its divisors is an integer number (3234466620).

Almost surely, 2^21323520235 is an apocalyptic number.

21323520235 is a deficient number, since it is larger than the sum of its proper divisors (4552212725).

21323520235 is an equidigital number, since it uses as much as digits as its factorization.

21323520235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47918117.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 21323520235 in words is "twenty-one billion, three hundred twenty-three million, five hundred twenty thousand, two hundred thirty-five".