21812881005260 has 12 divisors (see below), whose sum is σ = 45807050111088. Its totient is φ = 8725152402096.

The previous prime is 21812881005259. The next prime is 21812881005397. The reversal of 21812881005260 is 6250018821812.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545322025112 + ... + 545322025151.

It is an arithmetic number, because the mean of its divisors is an integer number (3817254175924).

Almost surely, 2^{21812881005260} is an apocalyptic number.

21812881005260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21812881005260 is an abundant number, since it is smaller than the sum of its proper divisors (23994169105828).

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

21812881005260 is a wasteful number, since it uses less digits than its factorization.

21812881005260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090644050272 (or 1090644050270 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 44.

The spelling of 21812881005260 in words is "twenty-one trillion, eight hundred twelve billion, eight hundred eighty-one million, five thousand, two hundred sixty".