20601242 has 4 divisors (see below), whose sum is σ = 30901866. Its totient is φ = 10300620.

The previous prime is 20601241. The next prime is 20601247. The reversal of 20601242 is 24210602.

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., 20511841 + 89401 = 4529^2 + 299^2 .

It is a super-2 number, since 2×20601242² = 848822343885128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20601242.

It is not an unprimeable number, because it can be changed into a prime (20601241) 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 as a sum of consecutive naturals, namely, 5150309 + ... + 5150312.

Almost surely, 2^20601242 is an apocalyptic number.

20601242 is a deficient number, since it is larger than the sum of its proper divisors (10300624).

20601242 is a wasteful number, since it uses less digits than its factorization.

20601242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300623.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20601242 is about 4538.8591077494. The cubic root of 20601242 is about 274.1349877427.

Adding to 20601242 its reverse (24210602), we get a palindrome (44811844).

The spelling of 20601242 in words is "twenty million, six hundred one thousand, two hundred forty-two".