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21202112330 = 257243269617
BaseRepresentation
bin10011101111101111…
…101000111101001010
32000201121111220100122
4103233233220331022
5321410220043310
613423510503242
71350256660400
oct235757507512
960647456318
1021202112330
118aa0048893
124138664b22
131ccb75b6c9
141051c05470
15841572555
hex4efbe8f4a

21202112330 has 24 divisors (see below), whose sum is σ = 44394628068. Its totient is φ = 7269295488.

The previous prime is 21202112311. The next prime is 21202112339. The reversal of 21202112330 is 3321120212.

Adding to 21202112330 its reverse (3321120212), we get a palindrome (24523232542).

It can be written as a sum of positive squares in 2 ways, for example, as 20309955169 + 892157161 = 142513^2 + 29869^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21202112299 and 21202112308.

It is not an unprimeable number, because it can be changed into a prime (21202112339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21634319 + ... + 21635298.

Almost surely, 221202112330 is an apocalyptic number.

21202112330 is an abundant number, since it is smaller than the sum of its proper divisors (23192515738).

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

21202112330 is a wasteful number, since it uses less digits than its factorization.

21202112330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43269638 (or 43269631 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The spelling of 21202112330 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred thirty".

Divisors: 1 2 5 7 10 14 35 49 70 98 245 490 43269617 86539234 216348085 302887319 432696170 605774638 1514436595 2120211233 3028873190 4240422466 10601056165 21202112330