21353324630 has 16 divisors (see below), whose sum is σ = 41930164944. Its totient is φ = 7764845280.

The previous prime is 21353324617. The next prime is 21353324639. The reversal of 21353324630 is 3642335312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353324639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97060457 + ... + 97060676.

It is an arithmetic number, because the mean of its divisors is an integer number (2620635309).

Almost surely, 2^21353324630 is an apocalyptic number.

21353324630 is a deficient number, since it is larger than the sum of its proper divisors (20576840314).

21353324630 is a wasteful number, since it uses less digits than its factorization.

21353324630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194121151.

The product of its (nonzero) digits is 38880, while the sum is 32.

Adding to 21353324630 its reverse (3642335312), we get a palindrome (24995659942).

The spelling of 21353324630 in words is "twenty-one billion, three hundred fifty-three million, three hundred twenty-four thousand, six hundred thirty".