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20451294 = 2321136183
BaseRepresentation
bin100111000000…
…0111111011110
31102111000220100
41032000333132
520213420134
62010201530
7335555523
oct116007736
942430810
1020451294
11105a93a6
126a232a6
134310976
142a0514a
151bde999
hex1380fde

20451294 has 12 divisors (see below), whose sum is σ = 44311176. Its totient is φ = 6817092.

The previous prime is 20451271. The next prime is 20451311. The reversal of 20451294 is 49215402.

20451294 is nontrivially palindromic in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568074 + ... + 568109.

It is an arithmetic number, because the mean of its divisors is an integer number (3692598).

Almost surely, 220451294 is an apocalyptic number.

20451294 is an abundant number, since it is smaller than the sum of its proper divisors (23859882).

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

20451294 is a wasteful number, since it uses less digits than its factorization.

20451294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136191 (or 1136188 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20451294 is about 4522.3106925553. The cubic root of 20451294 is about 273.4682620890.

Adding to 20451294 its reverse (49215402), we get a palindrome (69666696).

The spelling of 20451294 in words is "twenty million, four hundred fifty-one thousand, two hundred ninety-four".

Divisors: 1 2 3 6 9 18 1136183 2272366 3408549 6817098 10225647 20451294