20340670 has 32 divisors (see below), whose sum is σ = 44307648. Its totient is φ = 6563328.

The previous prime is 20340643. The next prime is 20340679. The reversal of 20340670 is 7604302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7357 + ... + 9736.

It is an arithmetic number, because the mean of its divisors is an integer number (1384614).

Almost surely, 2^20340670 is an apocalyptic number.

20340670 is an abundant number, since it is smaller than the sum of its proper divisors (23966978).

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

20340670 is a wasteful number, since it uses less digits than its factorization.

20340670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17124.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20340670 is about 4510.0631924619. The cubic root of 20340670 is about 272.9742939385.

Adding to 20340670 its reverse (7604302), we get a palindrome (27944972).

The spelling of 20340670 in words is "twenty million, three hundred forty thousand, six hundred seventy".