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20145710 = 2513353439
BaseRepresentation
bin100110011011…
…0011000101110
31101220111201102
41030312120232
520124130320
61555443102
7333143564
oct114663056
941814642
1020145710
111040a852
1268b6492
134234850
142965a34
151b7e175
hex133662e

20145710 has 32 divisors (see below), whose sum is σ = 39251520. Its totient is φ = 7400448.

The previous prime is 20145709. The next prime is 20145721. The reversal of 20145710 is 1754102.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45671 + ... + 46109.

It is an arithmetic number, because the mean of its divisors is an integer number (1226610).

Almost surely, 220145710 is an apocalyptic number.

20145710 is a deficient number, since it is larger than the sum of its proper divisors (19105810).

20145710 is a wasteful number, since it uses less digits than its factorization.

20145710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20145710 is about 4488.3972640576. The cubic root of 20145710 is about 272.0993635676.

Adding to 20145710 its reverse (1754102), we get a palindrome (21899812).

The spelling of 20145710 in words is "twenty million, one hundred forty-five thousand, seven hundred ten".

Divisors: 1 2 5 10 13 26 65 130 353 439 706 878 1765 2195 3530 4390 4589 5707 9178 11414 22945 28535 45890 57070 154967 309934 774835 1549670 2014571 4029142 10072855 20145710