Search a number
-
+
20713541 is a prime number
BaseRepresentation
bin100111100000…
…1000001000101
31102222100122012
41033001001011
520300313131
62015544005
7341030222
oct117010105
942870565
1020713541
1110768432
126b2b005
1343a3144
142a72949
151c4252b
hex13c1045

20713541 has 2 divisors, whose sum is σ = 20713542. Its totient is φ = 20713540.

The previous prime is 20713529. The next prime is 20713577. The reversal of 20713541 is 14531702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17724100 + 2989441 = 4210^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 20713541 - 218 = 20451397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20713141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10356770 + 10356771.

It is an arithmetic number, because the mean of its divisors is an integer number (10356771).

Almost surely, 220713541 is an apocalyptic number.

It is an amenable number.

20713541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20713541 is an equidigital number, since it uses as much as digits as its factorization.

20713541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20713541 is about 4551.2131349784. The cubic root of 20713541 is about 274.6321958959.

The spelling of 20713541 in words is "twenty million, seven hundred thirteen thousand, five hundred forty-one".