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20634211 = 132715857
BaseRepresentation
bin100111010110…
…1101001100011
31102211022211001
41032231221203
520240243321
62014132431
7340250023
oct116555143
942738731
1020634211
1110713874
126ab1117
134375cc0
142a51a83
151c28c91
hex13ada63

20634211 has 8 divisors (see below), whose sum is σ = 22307264. Its totient is φ = 18973440.

The previous prime is 20634161. The next prime is 20634217. The reversal of 20634211 is 11243602.

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

It is a cyclic number.

It is not a de Polignac number, because 20634211 - 211 = 20632163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20634217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (2788408).

Almost surely, 220634211 is an apocalyptic number.

20634211 is a deficient number, since it is larger than the sum of its proper divisors (1673053).

20634211 is a wasteful number, since it uses less digits than its factorization.

20634211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20634211 is about 4542.4895156731. The cubic root of 20634211 is about 274.2811462352.

Adding to 20634211 its reverse (11243602), we get a palindrome (31877813).

The spelling of 20634211 in words is "twenty million, six hundred thirty-four thousand, two hundred eleven".

Divisors: 1 13 271 3523 5857 76141 1587247 20634211