20123844 has 36 divisors (see below), whose sum is σ = 50850576. Its totient is φ = 6191328.

The previous prime is 20123843. The next prime is 20123861. The reversal of 20123844 is 44832102.

It is not an unprimeable number, because it can be changed into a prime (20123843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2934 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (1412516).

Almost surely, 2^20123844 is an apocalyptic number.

It is an amenable number.

20123844 is an abundant number, since it is smaller than the sum of its proper divisors (30726732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123844 is a wasteful number, since it uses less digits than its factorization.

20123844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9956 (or 9941 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20123844 is about 4485.9607666586. The cubic root of 20123844 is about 272.0008830710. Note that the first 3 decimals are identical.

Adding to 20123844 its reverse (44832102), we get a palindrome (64955946).

The spelling of 20123844 in words is "twenty million, one hundred twenty-three thousand, eight hundred forty-four".