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20700442 = 272211229
BaseRepresentation
bin100111011110…
…1110100011010
31102221200200001
41032331310122
520244403232
62015403214
7340644100
oct116756432
942850601
1020700442
1110759604
126b2350a
13439a1a9
142a6bc70
151c3d6e7
hex13bdd1a

20700442 has 12 divisors (see below), whose sum is σ = 36120330. Its totient is φ = 8871576.

The previous prime is 20700413. The next prime is 20700451. The reversal of 20700442 is 24400702.

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 3236401 = 4179^2 + 1799^2 .

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, 105517 + ... + 105712.

Almost surely, 220700442 is an apocalyptic number.

20700442 is a deficient number, since it is larger than the sum of its proper divisors (15419888).

20700442 is a wasteful number, since it uses less digits than its factorization.

20700442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211245 (or 211238 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20700442 is about 4549.7738405332. The cubic root of 20700442 is about 274.5742922968.

It can be divided in two parts, 207004 and 42, that added together give a triangular number (207046 = T643).

The spelling of 20700442 in words is "twenty million, seven hundred thousand, four hundred forty-two".

Divisors: 1 2 7 14 49 98 211229 422458 1478603 2957206 10350221 20700442