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20102111215 = 536710954829
BaseRepresentation
bin10010101110001011…
…011101111111101111
31220212221200001111121
4102232023131333233
5312132120024330
613122414001411
71311102061144
oct225613357757
956787601447
1020102111215
11858613275a
123a901a6267
131b848aa384
14d89aa63cb
157c9bdb17a
hex4ae2ddfef

20102111215 has 8 divisors (see below), whose sum is σ = 24188264640. Its totient is φ = 16037868192.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111215 is 51211120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20102111215 - 233 = 11512176623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5475580 + ... + 5479249.

It is an arithmetic number, because the mean of its divisors is an integer number (3023533080).

Almost surely, 220102111215 is an apocalyptic number.

20102111215 is a deficient number, since it is larger than the sum of its proper divisors (4086153425).

20102111215 is a wasteful number, since it uses less digits than its factorization.

20102111215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10955201.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 20102111215 its reverse (51211120102), we get a palindrome (71313231317).

The spelling of 20102111215 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred fifteen".

Divisors: 1 5 367 1835 10954829 54774145 4020422243 20102111215