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20115329 = 132935281
BaseRepresentation
bin100110010111…
…0111110000001
31101211222001012
41030232332001
520122142304
61555050305
7332656163
oct114567601
941758035
1020115329
1110399a43
1268a0995
134223a80
142958933
151b7516e
hex132ef81

20115329 has 8 divisors (see below), whose sum is σ = 21740712. Its totient is φ = 18501120.

The previous prime is 20115323. The next prime is 20115331. The reversal of 20115329 is 92351102.

It can be written as a sum of positive squares in 4 ways, for example, as 1392400 + 18722929 = 1180^2 + 4327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20115329 - 220 = 19066753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115323) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1169 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (2717589).

Almost surely, 220115329 is an apocalyptic number.

It is an amenable number.

20115329 is a deficient number, since it is larger than the sum of its proper divisors (1625383).

20115329 is a wasteful number, since it uses less digits than its factorization.

20115329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20115329 is about 4485.0115941879. The cubic root of 20115329 is about 271.9625137570.

The spelling of 20115329 in words is "twenty million, one hundred fifteen thousand, three hundred twenty-nine".

Divisors: 1 13 293 3809 5281 68653 1547333 20115329