20703040 has 56 divisors (see below), whose sum is σ = 50913792. Its totient is φ = 8010240.

The previous prime is 20703031. The next prime is 20703079. The reversal of 20703040 is 4030702.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8877 + ... + 10963.

Almost surely, 2^20703040 is an apocalyptic number.

20703040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20703040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25456896).

20703040 is an abundant number, since it is smaller than the sum of its proper divisors (30210752).

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

20703040 is a wasteful number, since it uses less digits than its factorization.

20703040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20703040 is about 4550.0593402724. The cubic root of 20703040 is about 274.5857785921.

Adding to 20703040 its reverse (4030702), we get a palindrome (24733742).

The spelling of 20703040 in words is "twenty million, seven hundred three thousand, forty".