20124657 has 12 divisors (see below), whose sum is σ = 33221760. Its totient is φ = 11499768.

The previous prime is 20124653. The next prime is 20124661. The reversal of 20124657 is 75642102.

20124657 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 4 + 657 = 666.

It is an interprime number because it is at equal distance from previous prime (20124653) and next prime (20124661).

It is not a de Polignac number, because 20124657 - 2² = 20124653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20124657.

It is not an unprimeable number, because it can be changed into a prime (20124653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159657 + ... + 159782.

It is an arithmetic number, because the mean of its divisors is an integer number (2768480).

Almost surely, 2^20124657 is an apocalyptic number.

It is an amenable number.

20124657 is a deficient number, since it is larger than the sum of its proper divisors (13097103).

20124657 is a wasteful number, since it uses less digits than its factorization.

20124657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319452 (or 319449 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20124657 is about 4486.0513817833. The cubic root of 20124657 is about 272.0045459520.

Adding to 20124657 its reverse (75642102), we get a palindrome (95766759).

The spelling of 20124657 in words is "twenty million, one hundred twenty-four thousand, six hundred fifty-seven".