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20731022 = 2137910093
BaseRepresentation
bin100111100010…
…1010010001110
31110000020121122
41033011102032
520301343042
62020200542
7341132204
oct117052216
943006548
1020731022
111077a584
126b39152
1343ab0a0
142a79074
151c477d2
hex13c548e

20731022 has 16 divisors (see below), whose sum is σ = 33915840. Its totient is φ = 9446112.

The previous prime is 20731001. The next prime is 20731043. The reversal of 20731022 is 22013702.

It is an interprime number because it is at equal distance from previous prime (20731001) and next prime (20731043).

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, 2993 + ... + 7100.

It is an arithmetic number, because the mean of its divisors is an integer number (2119740).

Almost surely, 220731022 is an apocalyptic number.

20731022 is a deficient number, since it is larger than the sum of its proper divisors (13184818).

20731022 is a wasteful number, since it uses less digits than its factorization.

20731022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20731022 is about 4553.1332069247. The cubic root of 20731022 is about 274.7094319336.

Adding to 20731022 its reverse (22013702), we get a palindrome (42744724).

The spelling of 20731022 in words is "twenty million, seven hundred thirty-one thousand, twenty-two".

Divisors: 1 2 13 26 79 158 1027 2054 10093 20186 131209 262418 797347 1594694 10365511 20731022