20020340 has 12 divisors (see below), whose sum is σ = 42042756. Its totient is φ = 8008128.

The previous prime is 20020333. The next prime is 20020387. The reversal of 20020340 is 4302002.

It can be written as a sum of positive squares in 2 ways, for example, as 12773476 + 7246864 = 3574^2 + 2692^2 .

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 3 ways as a sum of consecutive naturals, for example, 500489 + ... + 500528.

It is an arithmetic number, because the mean of its divisors is an integer number (3503563).

Almost surely, 2^20020340 is an apocalyptic number.

20020340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020340 is an abundant number, since it is smaller than the sum of its proper divisors (22022416).

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

20020340 is a wasteful number, since it uses less digits than its factorization.

20020340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001026 (or 1001024 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 20020340 is about 4474.4094582414. The cubic root of 20020340 is about 271.5337492399.

Adding to 20020340 its reverse (4302002), we get a palindrome (24322342).

The spelling of 20020340 in words is "twenty million, twenty thousand, three hundred forty".