20124242 has 4 divisors (see below), whose sum is σ = 30186366. Its totient is φ = 10062120.

The previous prime is 20124233. The next prime is 20124253. The reversal of 20124242 is 24242102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18826921 + 1297321 = 4339^2 + 1139^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20124242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031059 + ... + 5031062.

Almost surely, 2^20124242 is an apocalyptic number.

20124242 is a deficient number, since it is larger than the sum of its proper divisors (10062124).

20124242 is a wasteful number, since it uses less digits than its factorization.

20124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062123.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20124242 is about 4486.0051270590. The cubic root of 20124242 is about 272.0026762280.

Adding to 20124242 its reverse (24242102), we get a palindrome (44366344).

The spelling of 20124242 in words is "twenty million, one hundred twenty-four thousand, two hundred forty-two".