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23230505305 = 57294818389
BaseRepresentation
bin10101101000101001…
…010110000101011001
32012221222021221102101
4111220221112011121
5340034002132210
614401050203401
71451450015500
oct255051260531
965858257371
1023230505305
119941018517
124603a23561
132262a67437
1411a5371837
1590e692a3a
hex568a56159

23230505305 has 12 divisors (see below), whose sum is σ = 32427889380. Its totient is φ = 15929489184.

The previous prime is 23230505281. The next prime is 23230505327. The reversal of 23230505305 is 50350503232.

It can be written as a sum of positive squares in 2 ways, for example, as 7163421769 + 16067083536 = 84637^2 + 126756^2 .

It is not a de Polignac number, because 23230505305 - 215 = 23230472537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47408950 + ... + 47409439.

It is an arithmetic number, because the mean of its divisors is an integer number (2702324115).

Almost surely, 223230505305 is an apocalyptic number.

It is an amenable number.

23230505305 is a deficient number, since it is larger than the sum of its proper divisors (9197384075).

23230505305 is an equidigital number, since it uses as much as digits as its factorization.

23230505305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94818408 (or 94818401 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 28.

The spelling of 23230505305 in words is "twenty-three billion, two hundred thirty million, five hundred five thousand, three hundred five".

Divisors: 1 5 7 35 49 245 94818389 474091945 663728723 3318643615 4646101061 23230505305