20430678 has 8 divisors (see below), whose sum is σ = 40861368. Its totient is φ = 6810224.

The previous prime is 20430659. The next prime is 20430679. The reversal of 20430678 is 87603402.

It is a sphenic number, since it is the product of 3 distinct primes.

20430678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430679) 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 3 ways as a sum of consecutive naturals, for example, 1702551 + ... + 1702562.

It is an arithmetic number, because the mean of its divisors is an integer number (5107671).

Almost surely, 2^20430678 is an apocalyptic number.

20430678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20430678 is a wasteful number, since it uses less digits than its factorization.

20430678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405118.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20430678 is about 4520.0307521078. The cubic root of 20430678 is about 273.3763409754.

The spelling of 20430678 in words is "twenty million, four hundred thirty thousand, six hundred seventy-eight".