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BaseRepresentation
bin1001011000111100100000…
…11000100110110101011100
32201002221221122001010222110
410230132100120212311130
510201300240010132000
6111525413435314020
74230535604330556
oct454362030466534
981087848033873
1020648330161500
1166409a9091268
12239594bbab910
13b6a18aa65032
1451555515c4d6
1525c19cba1850
hex12c790626d5c

20648330161500 has 384 divisors, whose sum is σ = 62720599818240. Its totient is φ = 5272694784000.

The previous prime is 20648330161483. The next prime is 20648330161577. The reversal of 20648330161500 is 516103384602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3536275581 + ... + 3536281419.

It is an arithmetic number, because the mean of its divisors is an integer number (163334895360).

Almost surely, 220648330161500 is an apocalyptic number.

20648330161500 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 20648330161500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31360299909120).

20648330161500 is an abundant number, since it is smaller than the sum of its proper divisors (42072269656740).

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

20648330161500 is a wasteful number, since it uses less digits than its factorization.

20648330161500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678 (or 6666 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20648330161500 in words is "twenty trillion, six hundred forty-eight billion, three hundred thirty million, one hundred sixty-one thousand, five hundred".