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20102110015 = 513309263231
BaseRepresentation
bin10010101110001011…
…011101101100111111
31220212221122222212011
4102232023131230333
5312132120010030
613122413552051
71311102054511
oct225613355477
956787588764
1020102110015
118586131869
123a901a5627
131b848a9970
14d89aa5bb1
157c9bdab2a
hex4ae2ddb3f

20102110015 has 8 divisors (see below), whose sum is σ = 25978111488. Its totient is φ = 14844635040.

The previous prime is 20102110001. The next prime is 20102110057. The reversal of 20102110015 is 51001120102.

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

It is not a de Polignac number, because 20102110015 - 217 = 20101978943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102109977 and 20102110004.

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, 154631551 + ... + 154631680.

It is an arithmetic number, because the mean of its divisors is an integer number (3247263936).

Almost surely, 220102110015 is an apocalyptic number.

20102110015 is a deficient number, since it is larger than the sum of its proper divisors (5876001473).

20102110015 is a wasteful number, since it uses less digits than its factorization.

20102110015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309263249.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 20102110015 its reverse (51001120102), we get a palindrome (71103230117).

The spelling of 20102110015 in words is "twenty billion, one hundred two million, one hundred ten thousand, fifteen".

Divisors: 1 5 13 65 309263231 1546316155 4020422003 20102110015