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20887349 = 712792333
BaseRepresentation
bin100111110101…
…1011100110101
31110022012001112
41033223130311
520321343344
62023404405
7342353030
oct117533465
943265045
1020887349
1110876a7a
126bb3705
1344342a2
142aba017
151c78c9e
hex13eb735

20887349 has 8 divisors (see below), whose sum is σ = 23900160. Its totient is φ = 17881776.

The previous prime is 20887333. The next prime is 20887367. The reversal of 20887349 is 94378802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20887349 - 24 = 20887333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887249) 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, 7787 + ... + 10119.

It is an arithmetic number, because the mean of its divisors is an integer number (2987520).

Almost surely, 220887349 is an apocalyptic number.

It is an amenable number.

20887349 is a deficient number, since it is larger than the sum of its proper divisors (3012811).

20887349 is a wasteful number, since it uses less digits than its factorization.

20887349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 20887349 is about 4570.2679352528. The cubic root of 20887349 is about 275.3982065801.

The spelling of 20887349 in words is "twenty million, eight hundred eighty-seven thousand, three hundred forty-nine".

Divisors: 1 7 1279 2333 8953 16331 2983907 20887349