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20313222 = 233722473
BaseRepresentation
bin100110101111…
…1010010000110
31102020000111120
41031133102012
520200010342
62003214410
7334442136
oct115372206
942200446
1020313222
1110514696
126977406
134292b77
1429aaac6
151bb3aec
hex135f486

20313222 has 24 divisors (see below), whose sum is σ = 41771016. Its totient is φ = 6585408.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313222 is 22231302.

Adding to 20313222 its reverse (22231302), we get a palindrome (42544524).

It can be divided in two parts, 2031 and 3222, that added together give a triangular number (5253 = T102).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313229) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6978 + ... + 9450.

It is an arithmetic number, because the mean of its divisors is an integer number (1740459).

Almost surely, 220313222 is an apocalyptic number.

20313222 is an abundant number, since it is smaller than the sum of its proper divisors (21457794).

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

20313222 is a wasteful number, since it uses less digits than its factorization.

20313222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552 (or 2515 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20313222 is about 4507.0191923266. The cubic root of 20313222 is about 272.8514534887.

The spelling of 20313222 in words is "twenty million, three hundred thirteen thousand, two hundred twenty-two".

Divisors: 1 2 3 6 37 74 111 222 1369 2473 2738 4107 4946 7419 8214 14838 91501 183002 274503 549006 3385537 6771074 10156611 20313222