20151283 has 4 divisors (see below), whose sum is σ = 20264040. Its totient is φ = 20038528.

The previous prime is 20151277. The next prime is 20151293. The reversal of 20151283 is 38215102.

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

It is a cyclic number.

It is not a de Polignac number, because 20151283 - 2⁵ = 20151251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56110 + ... + 56467.

It is an arithmetic number, because the mean of its divisors is an integer number (5066010).

Almost surely, 2^20151283 is an apocalyptic number.

20151283 is a deficient number, since it is larger than the sum of its proper divisors (112757).

20151283 is a wasteful number, since it uses less digits than its factorization.

20151283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112756.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20151283 is about 4489.0180440716. The cubic root of 20151283 is about 272.1244519519.

Adding to 20151283 its reverse (38215102), we get a palindrome (58366385).

The spelling of 20151283 in words is "twenty million, one hundred fifty-one thousand, two hundred eighty-three".