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BaseRepresentation
bin100110011001…
…0110100011111
31101212202200102
41030302310133
520123143403
61555251315
7333053156
oct114626437
941782612
1020131103
11103aa883
1268a9b3b
13422acc5
14296059d
151b79b88
hex1332d1f

20131103 has 2 divisors, whose sum is σ = 20131104. Its totient is φ = 20131102.

The previous prime is 20131093. The next prime is 20131109. The reversal of 20131103 is 30113102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20131103 - 210 = 20130079 is a prime.

It is a super-2 number, since 2×201311032 = 810522615993218, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065551 + 10065552.

It is an arithmetic number, because the mean of its divisors is an integer number (10065552).

Almost surely, 220131103 is an apocalyptic number.

20131103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131103 is an equidigital number, since it uses as much as digits as its factorization.

20131103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20131103 is about 4486.7697734562. The cubic root of 20131103 is about 272.0335841966.

Adding to 20131103 its reverse (30113102), we get a palindrome (50244205).

The spelling of 20131103 in words is "twenty million, one hundred thirty-one thousand, one hundred three".