20010140 has 12 divisors (see below), whose sum is σ = 42021336. Its totient is φ = 8004048.

The previous prime is 20010127. The next prime is 20010157. The reversal of 20010140 is 4101002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500234 + ... + 500273.

It is an arithmetic number, because the mean of its divisors is an integer number (3501778).

Almost surely, 2^20010140 is an apocalyptic number.

20010140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010140 is an abundant number, since it is smaller than the sum of its proper divisors (22011196).

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

20010140 is a wasteful number, since it uses less digits than its factorization.

20010140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000516 (or 1000514 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20010140 is about 4473.2694978058. The cubic root of 20010140 is about 271.4876275667.

Adding to 20010140 its reverse (4101002), we get a palindrome (24111142).

The spelling of 20010140 in words is "twenty million, ten thousand, one hundred forty".