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20103001 = 172111681
BaseRepresentation
bin100110010101…
…1111101011001
31101211100010121
41030223331121
520121244001
61554513241
7332605222
oct114537531
941740117
1020103001
1110390756
126895821
13421b289
142954249
151b716a1
hex132bf59

20103001 has 4 divisors (see below), whose sum is σ = 20116404. Its totient is φ = 20089600.

The previous prime is 20102983. The next prime is 20103047. The reversal of 20103001 is 10030102.

Adding to 20103001 its reverse (10030102), we get a palindrome (30133103).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12595401 + 7507600 = 3549^2 + 2740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20103001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20103071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4120 + ... + 7561.

It is an arithmetic number, because the mean of its divisors is an integer number (5029101).

It is a 1500-hyperperfect number.

Almost surely, 220103001 is an apocalyptic number.

It is an amenable number.

20103001 is a deficient number, since it is larger than the sum of its proper divisors (13403).

20103001 is a wasteful number, since it uses less digits than its factorization.

20103001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13402.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20103001 is about 4483.6370281279. The cubic root of 20103001 is about 271.9069435493.

The spelling of 20103001 in words is "twenty million, one hundred three thousand, one".

Divisors: 1 1721 11681 20103001