Search a number
20311274 = 210155637
BaseRepresentation
bin100110101111…
…0110011101010
31102012220211102
41031132303222
520144430044
62003201402
7334433354
oct115366352
942186742
1020311274
1110513185
126976262
134292009
1429aa0d4
151bb324e
hex135ecea

20311274 has 4 divisors (see below), whose sum is σ = 30466914. Its totient is φ = 10155636.

The previous prime is 20311273. The next prime is 20311297. The reversal of 20311274 is 47211302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10608049 + 9703225 = 3257^2 + 3115^2 .

It is not an unprimeable number, because it can be changed into a prime (20311273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077817 + ... + 5077820.

Almost surely, 220311274 is an apocalyptic number.

20311274 is a deficient number, since it is larger than the sum of its proper divisors (10155640).

20311274 is a wasteful number, since it uses less digits than its factorization.

20311274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155639.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 20311274 is about 4506.8030797895. The cubic root of 20311274 is about 272.8427312285.

Adding to 20311274 its reverse (47211302), we get a palindrome (67522576).

The spelling of 20311274 in words is "twenty million, three hundred eleven thousand, two hundred seventy-four".

Divisors: 1 2 10155637 20311274