20862140 has 24 divisors (see below), whose sum is σ = 47181120. Its totient is φ = 7702848.

The previous prime is 20862139. The next prime is 20862151. The reversal of 20862140 is 4126802.

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, 39860 + ... + 40379.

It is an arithmetic number, because the mean of its divisors is an integer number (1965880).

Almost surely, 2^20862140 is an apocalyptic number.

20862140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20862140 is an abundant number, since it is smaller than the sum of its proper divisors (26318980).

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

20862140 is a wasteful number, since it uses less digits than its factorization.

20862140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80261 (or 80259 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20862140 is about 4567.5091680258. The cubic root of 20862140 is about 275.2873690225.

Adding to 20862140 its reverse (4126802), we get a palindrome (24988942).

The spelling of 20862140 in words is "twenty million, eight hundred sixty-two thousand, one hundred forty".