20000340 has 72 divisors (see below), whose sum is σ = 63318528. Its totient is φ = 5100480.

The previous prime is 20000339. The next prime is 20000353. The reversal of 20000340 is 4300002.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 23 ways as a sum of consecutive naturals, for example, 1725 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (879424).

Almost surely, 2^20000340 is an apocalyptic number.

20000340 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 20000340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31659264).

20000340 is an abundant number, since it is smaller than the sum of its proper divisors (43318188).

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

20000340 is a wasteful number, since it uses less digits than its factorization.

20000340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4869 (or 4864 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 20000340 is about 4472.1739679936. The cubic root of 20000340 is about 271.4432998208.

Adding to 20000340 its reverse (4300002), we get a palindrome (24300342).

The spelling of 20000340 in words is "twenty million, three hundred forty", and thus it is an aban number.