20023724 has 24 divisors (see below), whose sum is σ = 40981248. Its totient is φ = 8381520.

The previous prime is 20023721. The next prime is 20023727. The reversal of 20023724 is 42732002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20023721) and next prime (20023727).

It is a junction number, because it is equal to n+sod(n) for n = 20023696 and 20023705.

It is not an unprimeable number, because it can be changed into a prime (20023721) 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 7 ways as a sum of consecutive naturals, for example, 7112 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (1707552).

Almost surely, 2^20023724 is an apocalyptic number.

It is an amenable number.

20023724 is an abundant number, since it is smaller than the sum of its proper divisors (20957524).

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

20023724 is a wasteful number, since it uses less digits than its factorization.

20023724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16685 (or 16683 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20023724 is about 4474.7875927244. The cubic root of 20023724 is about 271.5490473225.

Adding to 20023724 its reverse (42732002), we get a palindrome (62755726).

The spelling of 20023724 in words is "twenty million, twenty-three thousand, seven hundred twenty-four".