Search a number
-
+
20672965 = 510973769
BaseRepresentation
bin100111011011…
…1000111000101
31102220021222101
41032313013011
520243013330
62015032101
7340501015
oct116670705
942807871
1020672965
111073a9a5
126b0b631
13438a831
142a61c45
151c354ca
hex13b71c5

20672965 has 8 divisors (see below), whose sum is σ = 24836760. Its totient is φ = 16518912.

The previous prime is 20672959. The next prime is 20672987. The reversal of 20672965 is 56927602.

It can be written as a sum of positive squares in 4 ways, for example, as 2982529 + 17690436 = 1727^2 + 4206^2 .

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 20672965 - 217 = 20541893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3601 + ... + 7369.

It is an arithmetic number, because the mean of its divisors is an integer number (3104595).

Almost surely, 220672965 is an apocalyptic number.

It is an amenable number.

20672965 is a deficient number, since it is larger than the sum of its proper divisors (4163795).

20672965 is a wasteful number, since it uses less digits than its factorization.

20672965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20672965 is about 4546.7532372012. The cubic root of 20672965 is about 274.4527519229.

The spelling of 20672965 in words is "twenty million, six hundred seventy-two thousand, nine hundred sixty-five".

Divisors: 1 5 1097 3769 5485 18845 4134593 20672965