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21896906 = 259185567
BaseRepresentation
bin101001110000…
…1111011001010
31112012110220112
41103201323022
521101200111
62101154322
7354056243
oct123417312
945173815
1021896906
11113a6519
1273bb9a2
1346c8965
142c9dcca
151dc7e8b
hex14e1eca

21896906 has 8 divisors (see below), whose sum is σ = 33402240. Its totient is φ = 10762828.

The previous prime is 21896893. The next prime is 21896939. The reversal of 21896906 is 60969812.

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

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 3 ways as a sum of consecutive naturals, for example, 92666 + ... + 92901.

It is an arithmetic number, because the mean of its divisors is an integer number (4175280).

Almost surely, 221896906 is an apocalyptic number.

21896906 is a deficient number, since it is larger than the sum of its proper divisors (11505334).

21896906 is a wasteful number, since it uses less digits than its factorization.

21896906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185628.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 21896906 is about 4679.4129973748. The cubic root of 21896906 is about 279.7655605652.

The spelling of 21896906 in words is "twenty-one million, eight hundred ninety-six thousand, nine hundred six".

Divisors: 1 2 59 118 185567 371134 10948453 21896906