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20071539 = 323171941
BaseRepresentation
bin100110010010…
…0010001110011
31101202201222100
41030210101303
520114242124
61554111443
7332414415
oct114442163
941681870
1020071539
111036a054
12687b583
134209b67
1429469b5
151b671c9
hex1324473

20071539 has 12 divisors (see below), whose sum is σ = 29927872. Its totient is φ = 12949200.

The previous prime is 20071529. The next prime is 20071553. The reversal of 20071539 is 93517002.

It is not a de Polignac number, because 20071539 - 29 = 20071027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35692 + ... + 36249.

Almost surely, 220071539 is an apocalyptic number.

20071539 is a deficient number, since it is larger than the sum of its proper divisors (9856333).

20071539 is a wasteful number, since it uses less digits than its factorization.

20071539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71978 (or 71975 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20071539 is about 4480.1271187322. The cubic root of 20071539 is about 271.7650210742.

The spelling of 20071539 in words is "twenty million, seventy-one thousand, five hundred thirty-nine".

Divisors: 1 3 9 31 93 279 71941 215823 647469 2230171 6690513 20071539