21241705630 has 32 divisors (see below), whose sum is σ = 38376270720. Its totient is φ = 8465346720.

The previous prime is 21241705613. The next prime is 21241705657. The reversal of 21241705630 is 3650714212.

It is a junction number, because it is equal to n+sod(n) for n = 21241705592 and 21241705601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8364901 + ... + 8367439.

It is an arithmetic number, because the mean of its divisors is an integer number (1199258460).

Almost surely, 2^21241705630 is an apocalyptic number.

21241705630 is a deficient number, since it is larger than the sum of its proper divisors (17134565090).

21241705630 is a wasteful number, since it uses less digits than its factorization.

21241705630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21241705630 in words is "twenty-one billion, two hundred forty-one million, seven hundred five thousand, six hundred thirty".