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20130212133 = 322236690237
BaseRepresentation
bin10010101111110110…
…101010100100100101
31220221220112201201100
4102233312222210211
5312211313242013
613125300150313
71311562660053
oct225766524445
956856481640
1020130212133
11859aa86359
123a99698399
131b8a668b35
14d8d6dd1d3
157cc3dc473
hex4afdaa925

20130212133 has 6 divisors (see below), whose sum is σ = 29076973094. Its totient is φ = 13420141416.

The previous prime is 20130212129. The next prime is 20130212161. The reversal of 20130212133 is 33121203102.

Adding to 20130212133 its reverse (33121203102), we get a palindrome (53251415235).

It can be written as a sum of positive squares in only one way, i.e., 11109581604 + 9020630529 = 105402^2 + 94977^2 .

It is not a de Polignac number, because 20130212133 - 22 = 20130212129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130212833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1118345110 + ... + 1118345127.

Almost surely, 220130212133 is an apocalyptic number.

It is an amenable number.

20130212133 is a deficient number, since it is larger than the sum of its proper divisors (8946760961).

20130212133 is a wasteful number, since it uses less digits than its factorization.

20130212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236690243 (or 2236690240 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The spelling of 20130212133 in words is "twenty billion, one hundred thirty million, two hundred twelve thousand, one hundred thirty-three".

Divisors: 1 3 9 2236690237 6710070711 20130212133