20124357 has 12 divisors (see below), whose sum is σ = 29494080. Its totient is φ = 12196360.

The previous prime is 20124353. The next prime is 20124359. The reversal of 20124357 is 75342102.

It is not a de Polignac number, because 20124357 - 2² = 20124353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124353) 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, 27357 + ... + 28082.

It is an arithmetic number, because the mean of its divisors is an integer number (2457840).

Almost surely, 2^20124357 is an apocalyptic number.

It is an amenable number.

20124357 is a deficient number, since it is larger than the sum of its proper divisors (9369723).

20124357 is a wasteful number, since it uses less digits than its factorization.

20124357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55464 (or 55453 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20124357 is about 4486.0179446810. The cubic root of 20124357 is about 272.0031943469.

Adding to 20124357 its reverse (75342102), we get a palindrome (95466459).

The spelling of 20124357 in words is "twenty million, one hundred twenty-four thousand, three hundred fifty-seven".