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20451324 = 2232374099
BaseRepresentation
bin100111000000…
…0111111111100
31102111000221110
41032000333330
520213420244
62010202020
7335555565
oct116007774
942430843
1020451324
11105a9423
126a23310
13431099a
142a0516c
151bde9b9
hex1380ffc

20451324 has 24 divisors (see below), whose sum is σ = 49795200. Its totient is φ = 6520624.

The previous prime is 20451317. The next prime is 20451329. The reversal of 20451324 is 42315402.

It is a self number, because there is not a number n which added to its sum of digits gives 20451324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451329) 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, 36774 + ... + 37325.

It is an arithmetic number, because the mean of its divisors is an integer number (2074800).

Almost surely, 220451324 is an apocalyptic number.

It is an amenable number.

20451324 is an abundant number, since it is smaller than the sum of its proper divisors (29343876).

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

20451324 is a wasteful number, since it uses less digits than its factorization.

20451324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74129 (or 74127 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20451324 is about 4522.3140094425. The cubic root of 20451324 is about 273.4683958058.

Adding to 20451324 its reverse (42315402), we get a palindrome (62766726).

The spelling of 20451324 in words is "twenty million, four hundred fifty-one thousand, three hundred twenty-four".

Divisors: 1 2 3 4 6 12 23 46 69 92 138 276 74099 148198 222297 296396 444594 889188 1704277 3408554 5112831 6817108 10225662 20451324