20124430 has 32 divisors (see below), whose sum is σ = 39261024. Its totient is φ = 7397376.

The previous prime is 20124409. The next prime is 20124437. The reversal of 20124430 is 3442102.

20124430 = 663² + 664² + ... + 705².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124437) 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 15 ways as a sum of consecutive naturals, for example, 5934 + ... + 8686.

It is an arithmetic number, because the mean of its divisors is an integer number (1226907).

Almost surely, 2^20124430 is an apocalyptic number.

20124430 is a deficient number, since it is larger than the sum of its proper divisors (19136594).

20124430 is a wasteful number, since it uses less digits than its factorization.

20124430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20124430 is about 4486.0260810655. The cubic root of 20124430 is about 272.0035232387.

Adding to 20124430 its reverse (3442102), we get a palindrome (23566532).

The spelling of 20124430 in words is "twenty million, one hundred twenty-four thousand, four hundred thirty".