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20631352 = 237252631
BaseRepresentation
bin100111010110…
…0111100111000
31102211011220011
41032230330320
520240200402
62014111304
7340235500
oct116547470
942734804
1020631352
1110711705
126aab534
134374901
142a50a00
151c27ed7
hex13acf38

20631352 has 24 divisors (see below), whose sum is σ = 45000360. Its totient is φ = 8841840.

The previous prime is 20631343. The next prime is 20631367. The reversal of 20631352 is 25313602.

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, 25924 + ... + 26707.

It is an arithmetic number, because the mean of its divisors is an integer number (1875015).

Almost surely, 220631352 is an apocalyptic number.

It is an amenable number.

20631352 is an abundant number, since it is smaller than the sum of its proper divisors (24369008).

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

20631352 is a wasteful number, since it uses less digits than its factorization.

20631352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52651 (or 52640 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20631352 is about 4542.1748094938. The cubic root of 20631352 is about 274.2684778562.

Adding to 20631352 its reverse (25313602), we get a palindrome (45944954).

The spelling of 20631352 in words is "twenty million, six hundred thirty-one thousand, three hundred fifty-two".

Divisors: 1 2 4 7 8 14 28 49 56 98 196 392 52631 105262 210524 368417 421048 736834 1473668 2578919 2947336 5157838 10315676 20631352