20020142 has 4 divisors (see below), whose sum is σ = 30030216. Its totient is φ = 10010070.

The previous prime is 20020109. The next prime is 20020151. The reversal of 20020142 is 24102002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005034 + ... + 5005037.

It is an arithmetic number, because the mean of its divisors is an integer number (7507554).

Almost surely, 2^20020142 is an apocalyptic number.

20020142 is a deficient number, since it is larger than the sum of its proper divisors (10010074).

20020142 is a wasteful number, since it uses less digits than its factorization.

20020142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010073.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20020142 is about 4474.3873323618. The cubic root of 20020142 is about 271.5328540860.

Adding to 20020142 its reverse (24102002), we get a palindrome (44122144).

The spelling of 20020142 in words is "twenty million, twenty thousand, one hundred forty-two".