20120243 has 12 divisors (see below), whose sum is σ = 23818704. Its totient is φ = 16882800.

The previous prime is 20120237. The next prime is 20120251. The reversal of 20120243 is 34202102.

It is not a de Polignac number, because 20120243 - 2⁸ = 20119987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20120203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4823 + ... + 7968.

It is an arithmetic number, because the mean of its divisors is an integer number (1984892).

Almost surely, 2^20120243 is an apocalyptic number.

20120243 is a deficient number, since it is larger than the sum of its proper divisors (3698461).

20120243 is a wasteful number, since it uses less digits than its factorization.

20120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826 (or 12815 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20120243 is about 4485.5593854056. The cubic root of 20120243 is about 271.9846579798.

Adding to 20120243 its reverse (34202102), we get a palindrome (54322345).

The spelling of 20120243 in words is "twenty million, one hundred twenty thousand, two hundred forty-three".