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23213331980 = 2251160666599
BaseRepresentation
bin10101100111100111…
…110101011000001100
32012220202222110001022
4111213213311120030
5340020103110410
614355234133312
71451151031466
oct254747653014
965822873038
1023213331980
119932358993
1245ba121238
13225c3337c7
1411a2d81136
1590cdee455
hex5679f560c

23213331980 has 12 divisors (see below), whose sum is σ = 48747997200. Its totient is φ = 9285332784.

The previous prime is 23213331979. The next prime is 23213332003. The reversal of 23213331980 is 8913331232.

It is a super-2 number, since 2×232133319802 (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23213331980.

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 3 ways as a sum of consecutive naturals, for example, 580333280 + ... + 580333319.

It is an arithmetic number, because the mean of its divisors is an integer number (4062333100).

Almost surely, 223213331980 is an apocalyptic number.

23213331980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23213331980 is an abundant number, since it is smaller than the sum of its proper divisors (25534665220).

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

23213331980 is a wasteful number, since it uses less digits than its factorization.

23213331980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160666608 (or 1160666606 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 23213331980 in words is "twenty-three billion, two hundred thirteen million, three hundred thirty-one thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 1160666599 2321333198 4642666396 5803332995 11606665990 23213331980