26821210020 has 96 divisors (see below), whose sum is σ = 83315312640. Its totient is φ = 6391896960.

The previous prime is 26821210007. The next prime is 26821210049. The reversal of 26821210020 is 2001212862.

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, 305452 + ... + 383331.

It is an arithmetic number, because the mean of its divisors is an integer number (867867840).

Almost surely, 2^26821210020 is an apocalyptic number.

26821210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26821210020 is an abundant number, since it is smaller than the sum of its proper divisors (56494102620).

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

26821210020 is a wasteful number, since it uses less digits than its factorization.

26821210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688865 (or 688863 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 26821210020 its reverse (2001212862), we get a palindrome (28822422882).

The spelling of 26821210020 in words is "twenty-six billion, eight hundred twenty-one million, two hundred ten thousand, twenty".