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BaseRepresentation
bin100111001000…
…0100000000000
31102121021001000
41032100200000
520222433231
62011412000
7336241650
oct116204000
942537030
1020514816
11106420a3
126a54000
13433385a
142a20360
151c036e6
hex1390800

20514816 has 192 divisors, whose sum is σ = 70761600. Its totient is φ = 5750784.

The previous prime is 20514787. The next prime is 20514829. The reversal of 20514816 is 61841502.

20514816 = 333 + 343 + ... + 953.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20514816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387046 + ... + 387098.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 220514816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20514816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

20514816 is an abundant number, since it is smaller than the sum of its proper divisors (50246784).

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

20514816 is an equidigital number, since it uses as much as digits as its factorization.

20514816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 20514816 is about 4529.3284270408. The cubic root of 20514816 is about 273.7511015156.

The spelling of 20514816 in words is "twenty million, five hundred fourteen thousand, eight hundred sixteen".