20056380 has 96 divisors (see below), whose sum is σ = 59609088. Its totient is φ = 5030400.

The previous prime is 20056363. The next prime is 20056403. The reversal of 20056380 is 8365002.

It is a self number, because there is not a number n which added to its sum of digits gives 20056380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76129 + ... + 76391.

It is an arithmetic number, because the mean of its divisors is an integer number (620928).

Almost surely, 2^20056380 is an apocalyptic number.

20056380 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 20056380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29804544).

20056380 is an abundant number, since it is smaller than the sum of its proper divisors (39552708).

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

20056380 is a wasteful number, since it uses less digits than its factorization.

20056380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20056380 is about 4478.4349945042. The cubic root of 20056380 is about 271.6965871337.

It can be divided in two parts, 2005 and 6380, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 20056380 in words is "twenty million, fifty-six thousand, three hundred eighty".