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21030500511 = 3213717056367
BaseRepresentation
bin10011100101100000…
…111111100010011111
32000021122121010012100
4103211200333202133
5321032302004021
613354500340143
71343104206366
oct234540774237
960248533170
1021030500511
118a12195339
1240ab0a4653
131ca2033857
1410370d27dd
15831474626
hex4e583f89f

21030500511 has 12 divisors (see below), whose sum is σ = 30599124192. Its totient is φ = 13917994656.

The previous prime is 21030500473. The next prime is 21030500549. The reversal of 21030500511 is 11500503012.

21030500511 is a `hidden beast` number, since 2 + 103 + 0 + 50 + 0 + 511 = 666.

It is an interprime number because it is at equal distance from previous prime (21030500473) and next prime (21030500549).

It is not a de Polignac number, because 21030500511 - 229 = 20493629599 is a prime.

It is a super-2 number, since 2×210305005112 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030501511) 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, 8526951 + ... + 8529416.

It is an arithmetic number, because the mean of its divisors is an integer number (2549927016).

Almost surely, 221030500511 is an apocalyptic number.

21030500511 is a deficient number, since it is larger than the sum of its proper divisors (9568623681).

21030500511 is a wasteful number, since it uses less digits than its factorization.

21030500511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17056510 (or 17056507 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The spelling of 21030500511 in words is "twenty-one billion, thirty million, five hundred thousand, five hundred eleven".

Divisors: 1 3 9 137 411 1233 17056367 51169101 153507303 2336722279 7010166837 21030500511