21841049544 has 16 divisors (see below), whose sum is σ = 54602623920. Its totient is φ = 7280349840.

The previous prime is 21841049533. The next prime is 21841049599. The reversal of 21841049544 is 44594014812.

It is a junction number, because it is equal to n+sod(n) for n = 21841049496 and 21841049505.

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, 455021842 + ... + 455021889.

It is an arithmetic number, because the mean of its divisors is an integer number (3412663995).

Almost surely, 2^21841049544 is an apocalyptic number.

21841049544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21841049544 is an abundant number, since it is smaller than the sum of its proper divisors (32761574376).

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

21841049544 is a wasteful number, since it uses less digits than its factorization.

21841049544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910043740 (or 910043736 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 21841049544 in words is "twenty-one billion, eight hundred forty-one million, forty-nine thousand, five hundred forty-four".