20703140 has 24 divisors (see below), whose sum is σ = 43727040. Its totient is φ = 8233568.

The previous prime is 20703131. The next prime is 20703143. The reversal of 20703140 is 4130702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20703143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (1821960).

Almost surely, 2^20703140 is an apocalyptic number.

20703140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20703140 is an abundant number, since it is smaller than the sum of its proper divisors (23023900).

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

20703140 is a wasteful number, since it uses less digits than its factorization.

20703140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971 (or 5969 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20703140 is about 4550.0703291268. The cubic root of 20703140 is about 274.5862206936.

Adding to 20703140 its reverse (4130702), we get a palindrome (24833842).

The spelling of 20703140 in words is "twenty million, seven hundred three thousand, one hundred forty".