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20310011 = 61332951
BaseRepresentation
bin100110101111…
…0011111111011
31102012212002122
41031132133323
520144410021
62003151455
7334426601
oct115363773
942185078
1020310011
1110512237
12697558b
134291577
1429a9871
151bb2bab
hex135e7fb

20310011 has 4 divisors (see below), whose sum is σ = 20643024. Its totient is φ = 19977000.

The previous prime is 20310007. The next prime is 20310023. The reversal of 20310011 is 11001302.

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

It is a cyclic number.

It is not a de Polignac number, because 20310011 - 22 = 20310007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20310001) 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, 166415 + ... + 166536.

It is an arithmetic number, because the mean of its divisors is an integer number (5160756).

Almost surely, 220310011 is an apocalyptic number.

20310011 is a deficient number, since it is larger than the sum of its proper divisors (333013).

20310011 is an equidigital number, since it uses as much as digits as its factorization.

20310011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333012.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 20310011 is about 4506.6629561129. The cubic root of 20310011 is about 272.8370757895.

Adding to 20310011 its reverse (11001302), we get a palindrome (31311313).

The spelling of 20310011 in words is "twenty million, three hundred ten thousand, eleven".

Divisors: 1 61 332951 20310011