20286123 has 16 divisors (see below), whose sum is σ = 31777536. Its totient is φ = 11348640.

The previous prime is 20286107. The next prime is 20286131. The reversal of 20286123 is 32168202.

It is not a de Polignac number, because 20286123 - 2⁴ = 20286107 is a prime.

It is a super-2 number, since 2×20286123² = 823053572742258, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 20286093 and 20286102.

It is not an unprimeable number, because it can be changed into a prime (20286223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23215 + ... + 24072.

It is an arithmetic number, because the mean of its divisors is an integer number (1986096).

Almost surely, 2^20286123 is an apocalyptic number.

20286123 is a deficient number, since it is larger than the sum of its proper divisors (11491413).

20286123 is a wasteful number, since it uses less digits than its factorization.

20286123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47314.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20286123 is about 4504.0118783147. The cubic root of 20286123 is about 272.7300663451.

The spelling of 20286123 in words is "twenty million, two hundred eighty-six thousand, one hundred twenty-three".