20270880 has 144 divisors (see below), whose sum is σ = 79095744. Its totient is φ = 4631040.

The previous prime is 20270879. The next prime is 20270909. The reversal of 20270880 is 8807202.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9075 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (549276).

Almost surely, 2^20270880 is an apocalyptic number.

20270880 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 20270880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39547872).

20270880 is an abundant number, since it is smaller than the sum of its proper divisors (58824864).

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

20270880 is a wasteful number, since it uses less digits than its factorization.

20270880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039 (or 2028 counting only the distinct ones).

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

The square root of 20270880 is about 4502.3194022637. The cubic root of 20270880 is about 272.6617394059.

The spelling of 20270880 in words is "twenty million, two hundred seventy thousand, eight hundred eighty".