21231650327 has 4 divisors (see below), whose sum is σ = 21683387616. Its totient is φ = 20779913040.

The previous prime is 21231650311. The next prime is 21231650329. The reversal of 21231650327 is 72305613212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21231650327 - 2⁴ = 21231650311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231650293 and 21231650302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231650329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225868574 + ... + 225868667.

It is an arithmetic number, because the mean of its divisors is an integer number (5420846904).

Almost surely, 2^21231650327 is an apocalyptic number.

21231650327 is a deficient number, since it is larger than the sum of its proper divisors (451737289).

21231650327 is an equidigital number, since it uses as much as digits as its factorization.

21231650327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451737288.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 21231650327 in words is "twenty-one billion, two hundred thirty-one million, six hundred fifty thousand, three hundred twenty-seven".