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23012012020 = 2257191600279
BaseRepresentation
bin10101011011100111…
…110110111111110100
32012101202011022222111
4111123213312333310
5334112033341040
614323243140404
71443154606024
oct253347667764
965352138874
1023012012020
119839754258
124562814704
13222970677a
141184337a84
158ea3d3dea
hex55b9f6ff4

23012012020 has 24 divisors (see below), whose sum is σ = 48392467200. Its totient is φ = 9191996832.

The previous prime is 23012012011. The next prime is 23012012033. The reversal of 23012012020 is 2021021032.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785760 + ... + 814519.

It is an arithmetic number, because the mean of its divisors is an integer number (2016352800).

Almost surely, 223012012020 is an apocalyptic number.

23012012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012012020 is an abundant number, since it is smaller than the sum of its proper divisors (25380455180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23012012020 is a wasteful number, since it uses less digits than its factorization.

23012012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601007 (or 1601005 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 23012012020 its reverse (2021021032), we get a palindrome (25033033052).

The spelling of 23012012020 in words is "twenty-three billion, twelve million, twelve thousand, twenty".

Divisors: 1 2 4 5 10 20 719 1438 2876 3595 7190 14380 1600279 3200558 6401116 8001395 16002790 32005580 1150600601 2301201202 4602402404 5753003005 11506006010 23012012020