21630030213645 has 48 divisors (see below), whose sum is σ = 44435025048960. Its totient is φ = 9888013808064.

The previous prime is 21630030213643. The next prime is 21630030213707. The reversal of 21630030213645 is 54631203003612.

21630030213645 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 0 + 0 + 3 + 0 + 2 + 1 + 3 + 645 = 666.

It is not a de Polignac number, because 21630030213645 - 2¹ = 21630030213643 is a prime.

It is a super-3 number, since 3×21630030213645³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21630030213643) 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, 1271598210 + ... + 1271615219.

It is an arithmetic number, because the mean of its divisors is an integer number (925729688520).

Almost surely, 2^{21630030213645} is an apocalyptic number.

It is an amenable number.

21630030213645 is an abundant number, since it is smaller than the sum of its proper divisors (22804994835315).

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

21630030213645 is an equidigital number, since it uses as much as digits as its factorization.

21630030213645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543213456 (or 2543213444 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 21630030213645 in words is "twenty-one trillion, six hundred thirty billion, thirty million, two hundred thirteen thousand, six hundred forty-five".