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20247344 = 2413311313
BaseRepresentation
bin100110100111…
…1001100110000
31102002200010122
41031033030300
520140403334
62001545412
7334046105
oct115171460
942080118
1020247344
111047a147
126945268
13426bba0
142990aac
151b9e32e
hex134f330

20247344 has 40 divisors (see below), whose sum is σ = 42518112. Its totient is φ = 9285120.

The previous prime is 20247343. The next prime is 20247347. The reversal of 20247344 is 44374202.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20247341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64532 + ... + 64844.

Almost surely, 220247344 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 20247344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21259056).

20247344 is an abundant number, since it is smaller than the sum of its proper divisors (22270768).

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

20247344 is a wasteful number, since it uses less digits than its factorization.

20247344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 20247344 is about 4499.7048792115. The cubic root of 20247344 is about 272.5561716821.

The spelling of 20247344 in words is "twenty million, two hundred forty-seven thousand, three hundred forty-four".

Divisors: 1 2 4 8 13 16 26 52 104 208 311 313 622 626 1244 1252 2488 2504 4043 4069 4976 5008 8086 8138 16172 16276 32344 32552 64688 65104 97343 194686 389372 778744 1265459 1557488 2530918 5061836 10123672 20247344