20310142 has 4 divisors (see below), whose sum is σ = 30465216. Its totient is φ = 10155070.

The previous prime is 20310137. The next prime is 20310163. The reversal of 20310142 is 24101302.

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, 5077534 + ... + 5077537.

It is an arithmetic number, because the mean of its divisors is an integer number (7616304).

Almost surely, 2^20310142 is an apocalyptic number.

20310142 is a deficient number, since it is larger than the sum of its proper divisors (10155074).

20310142 is a wasteful number, since it uses less digits than its factorization.

20310142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155073.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20310142 is about 4506.6774901251. The cubic root of 20310142 is about 272.8376623899.

Adding to 20310142 its reverse (24101302), we get a palindrome (44411444).

The spelling of 20310142 in words is "twenty million, three hundred ten thousand, one hundred forty-two".