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20812088 = 2311713331
BaseRepresentation
bin100111101100…
…1000100111000
31110011100211002
41033121010320
520311441323
62022024132
7341620433
oct117310470
943140732
1020812088
1110825480
126b78048
134408c5b
142a9a81a
151c61828
hex13d9138

20812088 has 32 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 9324000.

The previous prime is 20812039. The next prime is 20812091. The reversal of 20812088 is 88021802.

It is a self number, because there is not a number n which added to its sum of digits gives 20812088.

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, 4583 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 220812088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20812088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21591360).

20812088 is an abundant number, since it is smaller than the sum of its proper divisors (22370632).

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

20812088 is a wasteful number, since it uses less digits than its factorization.

20812088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419 (or 3415 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 20812088 is about 4562.0267425783. The cubic root of 20812088 is about 275.0670382019.

The spelling of 20812088 in words is "twenty million, eight hundred twelve thousand, eighty-eight".

Divisors: 1 2 4 8 11 22 44 71 88 142 284 568 781 1562 3124 3331 6248 6662 13324 26648 36641 73282 146564 236501 293128 473002 946004 1892008 2601511 5203022 10406044 20812088