Search a number
-
+
20236857 = 318893571
BaseRepresentation
bin100110100110…
…0101000111001
31102002010202020
41031030220321
520140034412
62001425053
7334003404
oct115145071
942063666
1020236857
1110472283
12693b189
134267194
14298ad3b
151b9b18c
hex134ca39

20236857 has 8 divisors (see below), whose sum is σ = 27004320. Its totient is φ = 13480320.

The previous prime is 20236807. The next prime is 20236861. The reversal of 20236857 is 75863202.

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

It is not a de Polignac number, because 20236857 - 26 = 20236793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20236807) 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, 3882 + ... + 7452.

It is an arithmetic number, because the mean of its divisors is an integer number (3375540).

Almost surely, 220236857 is an apocalyptic number.

It is an amenable number.

20236857 is a deficient number, since it is larger than the sum of its proper divisors (6767463).

20236857 is a wasteful number, since it uses less digits than its factorization.

20236857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20236857 is about 4498.5394296371. The cubic root of 20236857 is about 272.5091072343.

The spelling of 20236857 in words is "twenty million, two hundred thirty-six thousand, eight hundred fifty-seven".

Divisors: 1 3 1889 3571 5667 10713 6745619 20236857