21044214630 has 24 divisors (see below), whose sum is σ = 54714958272. Its totient is φ = 5611790544.

The previous prime is 21044214551. The next prime is 21044214671. The reversal of 21044214630 is 3641244012.

It is a happy number.

21044214630 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 4 + 21 + 4 + 630 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21044214594 and 21044214603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116912214 + ... + 116912393.

It is an arithmetic number, because the mean of its divisors is an integer number (2279789928).

Almost surely, 2^21044214630 is an apocalyptic number.

21044214630 is an abundant number, since it is smaller than the sum of its proper divisors (33670743642).

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

21044214630 is a wasteful number, since it uses less digits than its factorization.

21044214630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233824620 (or 233824617 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21044214630 its reverse (3641244012), we get a palindrome (24685458642).

The spelling of 21044214630 in words is "twenty-one billion, forty-four million, two hundred fourteen thousand, six hundred thirty".