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20634926 = 2134318457
BaseRepresentation
bin100111010110…
…1110100101110
31102211100210112
41032231310232
520240304201
62014140022
7340252064
oct116556456
942740715
1020634926
1110714364
126ab1612
134376420
142a52034
151c290bb
hex13add2e

20634926 has 16 divisors (see below), whose sum is σ = 34110384. Its totient is φ = 9301824.

The previous prime is 20634881. The next prime is 20634949. The reversal of 20634926 is 62943602.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20634892 and 20634901.

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, 8111 + ... + 10346.

It is an arithmetic number, because the mean of its divisors is an integer number (2131899).

Almost surely, 220634926 is an apocalyptic number.

20634926 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20634926 is a deficient number, since it is larger than the sum of its proper divisors (13475458).

20634926 is a wasteful number, since it uses less digits than its factorization.

20634926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18515.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20634926 is about 4542.5682163287. The cubic root of 20634926 is about 274.2843142548.

The spelling of 20634926 in words is "twenty million, six hundred thirty-four thousand, nine hundred twenty-six".

Divisors: 1 2 13 26 43 86 559 1118 18457 36914 239941 479882 793651 1587302 10317463 20634926