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20440123000 = 23531123173467
BaseRepresentation
bin10011000010010100…
…111000011001111000
31221202111200211111121
4103002110320121320
5313330132414000
613220130435024
71322345115223
oct230224703170
957674624447
1020440123000
118739a09a40
123b65432a74
131c09926a4b
14dbc9325ba
157e9707b1a
hex4c2538678

20440123000 has 256 divisors, whose sum is σ = 54878653440. Its totient is φ = 7053376000.

The previous prime is 20440122947. The next prime is 20440123019. The reversal of 20440123000 is 32104402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43768767 + ... + 43769233.

It is an arithmetic number, because the mean of its divisors is an integer number (214369740).

Almost surely, 220440123000 is an apocalyptic number.

20440123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20440123000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27439326720).

20440123000 is an abundant number, since it is smaller than the sum of its proper divisors (34438530440).

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

20440123000 is a wasteful number, since it uses less digits than its factorization.

20440123000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20440123000 its reverse (32104402), we get a palindrome (20472227402).

The spelling of 20440123000 in words is "twenty billion, four hundred forty million, one hundred twenty-three thousand".