20427600 has 120 divisors (see below), whose sum is σ = 67808160. Its totient is φ = 5250560.

The previous prime is 20427599. The next prime is 20427601. The reversal of 20427600 is 672402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20427599) and next prime (20427601).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427601) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 34507 + ... + 35093.

It is an arithmetic number, because the mean of its divisors is an integer number (565068).

Almost surely, 2^20427600 is an apocalyptic number.

20427600 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 20427600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33904080).

20427600 is an abundant number, since it is smaller than the sum of its proper divisors (47380560).

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

20427600 is a wasteful number, since it uses less digits than its factorization.

20427600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20427600 is about 4519.6902548737. The cubic root of 20427600 is about 273.3626117094.

The spelling of 20427600 in words is "twenty million, four hundred twenty-seven thousand, six hundred".