20102142 has 16 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 6674712.

The previous prime is 20102129. The next prime is 20102153. The reversal of 20102142 is 24120102.

It is a super-2 number, since 2×20102142² = 808192225976328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4792 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^20102142 is an apocalyptic number.

20102142 is an abundant number, since it is smaller than the sum of its proper divisors (20258178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20102142 is a wasteful number, since it uses less digits than its factorization.

20102142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20102142 is about 4483.5412343370. The cubic root of 20102142 is about 271.9030706384.

Adding to 20102142 its reverse (24120102), we get a palindrome (44222244).

The spelling of 20102142 in words is "twenty million, one hundred two thousand, one hundred forty-two".