21155014215630 has 24 divisors (see below), whose sum is σ = 55003036960872. Its totient is φ = 5641337124144.

The previous prime is 21155014215619. The next prime is 21155014215683. The reversal of 21155014215630 is 3651241055112.

21155014215630 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 5 + 0 + 1 + 4 + 2 + 15 + 630 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117527856664 + ... + 117527856843.

It is an arithmetic number, because the mean of its divisors is an integer number (2291793206703).

Almost surely, 2^{21155014215630} is an apocalyptic number.

21155014215630 is an abundant number, since it is smaller than the sum of its proper divisors (33848022745242).

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

21155014215630 is a wasteful number, since it uses less digits than its factorization.

21155014215630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235055713520 (or 235055713517 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 21155014215630 in words is "twenty-one trillion, one hundred fifty-five billion, fourteen million, two hundred fifteen thousand, six hundred thirty".