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20110122 = 2328091381
BaseRepresentation
bin100110010110…
…1101100101010
31101211200220100
41030231230222
520122010442
61555010230
7332635044
oct114555452
941750810
1020110122
111039603a
126899976
1342215a6
142956a94
151b7384c
hex132db2a

20110122 has 24 divisors (see below), whose sum is σ = 43657380. Its totient is φ = 6690240.

The previous prime is 20110109. The next prime is 20110141. The reversal of 20110122 is 22101102.

It can be written as a sum of positive squares in 2 ways, for example, as 19368801 + 741321 = 4401^2 + 861^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13872 + ... + 15252.

Almost surely, 220110122 is an apocalyptic number.

20110122 is an abundant number, since it is smaller than the sum of its proper divisors (23547258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110122 is a wasteful number, since it uses less digits than its factorization.

20110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198 (or 2195 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20110122 is about 4484.4310675937. The cubic root of 20110122 is about 271.9390452368.

Adding to 20110122 its reverse (22101102), we get a palindrome (42211224).

The spelling of 20110122 in words is "twenty million, one hundred ten thousand, one hundred twenty-two".

Divisors: 1 2 3 6 9 18 809 1381 1618 2427 2762 4143 4854 7281 8286 12429 14562 24858 1117229 2234458 3351687 6703374 10055061 20110122