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20313023 = 25779039
BaseRepresentation
bin100110101111…
…1001110111111
31102020000020012
41031133032333
520200004043
62003213435
7334441433
oct115371677
942200205
1020313023
1110514525
12697727b
134292a53
1429aa9c3
151bb3a18
hex135f3bf

20313023 has 4 divisors (see below), whose sum is σ = 20392320. Its totient is φ = 20233728.

The previous prime is 20313001. The next prime is 20313047. The reversal of 20313023 is 32031302.

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 20313023 - 26 = 20312959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312989 and 20313007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310023) 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, 39263 + ... + 39776.

It is an arithmetic number, because the mean of its divisors is an integer number (5098080).

Almost surely, 220313023 is an apocalyptic number.

20313023 is a deficient number, since it is larger than the sum of its proper divisors (79297).

20313023 is an equidigital number, since it uses as much as digits as its factorization.

20313023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79296.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20313023 is about 4506.9971155970. The cubic root of 20313023 is about 272.8505624825.

Adding to 20313023 its reverse (32031302), we get a palindrome (52344325).

It can be divided in two parts, 2031302 and 3, that multiplied together give a palindrome (6093906).

The spelling of 20313023 in words is "twenty million, three hundred thirteen thousand, twenty-three".

Divisors: 1 257 79039 20313023