20124658 has 8 divisors (see below), whose sum is σ = 30295260. Its totient is φ = 10026240.

The previous prime is 20124653. The next prime is 20124661. The reversal of 20124658 is 85642102.

It can be written as a sum of positive squares in 2 ways, for example, as 19954089 + 170569 = 4467^2 + 413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 17343 + ... + 18466.

Almost surely, 2^20124658 is an apocalyptic number.

20124658 is a deficient number, since it is larger than the sum of its proper divisors (10170602).

20124658 is a wasteful number, since it uses less digits than its factorization.

20124658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36092.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20124658 is about 4486.0514932399. The cubic root of 20124658 is about 272.0045504573.

It can be divided in two parts, 2012 and 4658, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20124658 in words is "twenty million, one hundred twenty-four thousand, six hundred fifty-eight".