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20853936 = 243416091
BaseRepresentation
bin100111110001…
…1010010110000
31110020111020000
41033203102300
520314311221
62022550000
7342153435
oct117432260
943214200
1020853936
1110853964
126b98300
13442200c
142aabb8c
151c6de26
hex13e34b0

20853936 has 50 divisors (see below), whose sum is σ = 60361092. Its totient is φ = 6950880.

The previous prime is 20853923. The next prime is 20853941. The reversal of 20853936 is 63935802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20853936.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6750 + ... + 9341.

Almost surely, 220853936 is an apocalyptic number.

It is an amenable number.

20853936 is an abundant number, since it is smaller than the sum of its proper divisors (39507156).

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

20853936 is a wasteful number, since it uses less digits than its factorization.

20853936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16111 (or 16096 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20853936 is about 4566.6109972276. The cubic root of 20853936 is about 275.2512788661.

The spelling of 20853936 in words is "twenty million, eight hundred fifty-three thousand, nine hundred thirty-six".