20620042 has 4 divisors (see below), whose sum is σ = 30930066. Its totient is φ = 10310020.

The previous prime is 20620037. The next prime is 20620049. The reversal of 20620042 is 24002602.

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., 13549761 + 7070281 = 3681^2 + 2659^2 .

It is a super-2 number, since 2×20620042² = 850372264163528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20619998 and 20620025.

It is not an unprimeable number, because it can be changed into a prime (20620049) 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 as a sum of consecutive naturals, namely, 5155009 + ... + 5155012.

Almost surely, 2^20620042 is an apocalyptic number.

20620042 is a deficient number, since it is larger than the sum of its proper divisors (10310024).

20620042 is a wasteful number, since it uses less digits than its factorization.

20620042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310023.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20620042 is about 4540.9296405031. The cubic root of 20620042 is about 274.2183511770.

Adding to 20620042 its reverse (24002602), we get a palindrome (44622644).

The spelling of 20620042 in words is "twenty million, six hundred twenty thousand, forty-two".