20207880 has 288 divisors, whose sum is σ = 85026240. Its totient is φ = 4199040.

The previous prime is 20207861. The next prime is 20207909. The reversal of 20207880 is 8870202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1837075 + ... + 1837085.

It is an arithmetic number, because the mean of its divisors is an integer number (295230).

Almost surely, 2^20207880 is an apocalyptic number.

20207880 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 20207880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42513120).

20207880 is an abundant number, since it is smaller than the sum of its proper divisors (64818360).

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

20207880 is an equidigital number, since it uses as much as digits as its factorization.

20207880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20207880 is about 4495.3175638658. The cubic root of 20207880 is about 272.3789772050.

The spelling of 20207880 in words is "twenty million, two hundred seven thousand, eight hundred eighty".