26401303220 has 12 divisors (see below), whose sum is σ = 55442736804. Its totient is φ = 10560521280.

The previous prime is 26401303207. The next prime is 26401303223. The reversal of 26401303220 is 2230310462.

It can be written as a sum of positive squares in 2 ways, for example, as 5733215524 + 20668087696 = 75718^2 + 143764^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26401303223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660032561 + ... + 660032600.

It is an arithmetic number, because the mean of its divisors is an integer number (4620228067).

Almost surely, 2^26401303220 is an apocalyptic number.

26401303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26401303220 is an abundant number, since it is smaller than the sum of its proper divisors (29041433584).

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

26401303220 is a wasteful number, since it uses less digits than its factorization.

26401303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320065170 (or 1320065168 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 26401303220 its reverse (2230310462), we get a palindrome (28631613682).

The spelling of 26401303220 in words is "twenty-six billion, four hundred one million, three hundred three thousand, two hundred twenty".