21542440790882 has 16 divisors (see below), whose sum is σ = 35251575849504. Its totient is φ = 9791932680000.

The previous prime is 21542440790861. The next prime is 21542440790887. The reversal of 21542440790882 is 28809704424512.

It is not an unprimeable number, because it can be changed into a prime (21542440790887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692044 + ... + 6778487.

It is an arithmetic number, because the mean of its divisors is an integer number (2203223490594).

Almost surely, 2^{21542440790882} is an apocalyptic number.

21542440790882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21542440790882 is a deficient number, since it is larger than the sum of its proper divisors (13709135058622).

21542440790882 is a wasteful number, since it uses less digits than its factorization.

21542440790882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586145.

The product of its (nonzero) digits is 10321920, while the sum is 56.

It can be divided in two parts, 21542440 and 790882, that added together give a palindrome (22333322).

The spelling of 21542440790882 in words is "twenty-one trillion, five hundred forty-two billion, four hundred forty million, seven hundred ninety thousand, eight hundred eighty-two".