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23313212220 = 2235388553537
BaseRepresentation
bin10101101101100100…
…110110001100111100
32020011201220212222110
4111231210312030330
5340221140242340
614413203014020
71453503014514
oct255544661474
966151825873
1023313212220
119983778441
12462766a310
132276c3493c
1411b2340844
15916a7d680
hex56d93633c

23313212220 has 24 divisors (see below), whose sum is σ = 65276994384. Its totient is φ = 6216856576.

The previous prime is 23313212207. The next prime is 23313212231. The reversal of 23313212220 is 2221231332.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194276709 + ... + 194276828.

It is an arithmetic number, because the mean of its divisors is an integer number (2719874766).

Almost surely, 223313212220 is an apocalyptic number.

23313212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23313212220 is an abundant number, since it is smaller than the sum of its proper divisors (41963782164).

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

23313212220 is a wasteful number, since it uses less digits than its factorization.

23313212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388553549 (or 388553547 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23313212220 its reverse (2221231332), we get a palindrome (25534443552).

The spelling of 23313212220 in words is "twenty-three billion, three hundred thirteen million, two hundred twelve thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 388553537 777107074 1165660611 1554214148 1942767685 2331321222 3885535370 4662642444 5828303055 7771070740 11656606110 23313212220