20142140 has 24 divisors (see below), whose sum is σ = 42411600. Its totient is φ = 8035328.

The previous prime is 20142131. The next prime is 20142163. The reversal of 20142140 is 4124102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7859 + ... + 10101.

It is an arithmetic number, because the mean of its divisors is an integer number (1767150).

Almost surely, 2^20142140 is an apocalyptic number.

20142140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20142140 is an abundant number, since it is smaller than the sum of its proper divisors (22269460).

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

20142140 is a wasteful number, since it uses less digits than its factorization.

20142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701 (or 2699 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20142140 is about 4487.9995543672. Note that the first 3 decimals coincide. The cubic root of 20142140 is about 272.0832898044.

Adding to 20142140 its reverse (4124102), we get a palindrome (24266242).

The spelling of 20142140 in words is "twenty million, one hundred forty-two thousand, one hundred forty".