20061442 has 4 divisors (see below), whose sum is σ = 30092166. Its totient is φ = 10030720.

The previous prime is 20061439. The next prime is 20061449. The reversal of 20061442 is 24416002.

It is a Cunningham number, because it is equal to 4479²+1.

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., 20061441 + 1 = 4479^2 + 1^2 .

It is a super-2 number, since 2×20061442² = 804922910238728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20061449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015359 + ... + 5015362.

Almost surely, 2^20061442 is an apocalyptic number.

20061442 is a deficient number, since it is larger than the sum of its proper divisors (10030724).

20061442 is a wasteful number, since it uses less digits than its factorization.

20061442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10030723.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20061442 is about 4479.0001116321. Note that the first 3 decimals coincide. The cubic root of 20061442 is about 271.7194429105.

Adding to 20061442 its reverse (24416002), we get a palindrome (44477444).

It can be divided in two parts, 20061 and 442, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20061442 in words is "twenty million, sixty-one thousand, four hundred forty-two".