21155324632300 has 18 divisors (see below), whose sum is σ = 45907054452308. Its totient is φ = 8462129852880.

The previous prime is 21155324632261. The next prime is 21155324632313. The reversal of 21155324632300 is 323642355112.

It is a self number, because there is not a number n which added to its sum of digits gives 21155324632300.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105776623062 + ... + 105776623261.

Almost surely, 2^{21155324632300} is an apocalyptic number.

21155324632300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21155324632300 is an abundant number, since it is smaller than the sum of its proper divisors (24751729820008).

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

21155324632300 is a wasteful number, since it uses less digits than its factorization.

21155324632300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211553246337 (or 211553246330 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 21155324632300 its reverse (323642355112), we get a palindrome (21478966987412).

The spelling of 21155324632300 in words is "twenty-one trillion, one hundred fifty-five billion, three hundred twenty-four million, six hundred thirty-two thousand, three hundred".