21436563231630 has 96 divisors (see below), whose sum is σ = 57534916578048. Its totient is φ = 5531829120000.

The previous prime is 21436563231593. The next prime is 21436563231637. The reversal of 21436563231630 is 3613236563412.

21436563231630 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 6 + 5 + 6 + 3 + 2 + 3 + 1 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21436563231637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94738630 + ... + 94964630.

It is an arithmetic number, because the mean of its divisors is an integer number (599322047688).

Almost surely, 2^{21436563231630} is an apocalyptic number.

21436563231630 is an abundant number, since it is smaller than the sum of its proper divisors (36098353346418).

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

21436563231630 is a wasteful number, since it uses less digits than its factorization.

21436563231630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260042 (or 260039 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

The spelling of 21436563231630 in words is "twenty-one trillion, four hundred thirty-six billion, five hundred sixty-three million, two hundred thirty-one thousand, six hundred thirty".