20261080 has 48 divisors (see below), whose sum is σ = 52294320. Its totient is φ = 6920832.

The previous prime is 20261071. The next prime is 20261081. The reversal of 20261080 is 8016202.

It is a happy number.

It is a super-2 number, since 2×20261080² = 821022725532800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261081) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 75186 + ... + 75454.

It is an arithmetic number, because the mean of its divisors is an integer number (1089465).

Almost surely, 2^20261080 is an apocalyptic number.

20261080 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 20261080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26147160).

20261080 is an abundant number, since it is smaller than the sum of its proper divisors (32033240).

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

20261080 is an equidigital number, since it uses as much as digits as its factorization.

20261080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20261080 is about 4501.2309427533. The cubic root of 20261080 is about 272.6177926907.

Adding to 20261080 its reverse (8016202), we get a palindrome (28277282).

The spelling of 20261080 in words is "twenty million, two hundred sixty-one thousand, eighty".