21410243544 has 64 divisors (see below), whose sum is σ = 53797011840. Its totient is φ = 7100656640.

The previous prime is 21410243507. The next prime is 21410243557. The reversal of 21410243544 is 44534201412.

It is a super-2 number, since 2×21410243544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4157179 + ... + 4162325.

It is an arithmetic number, because the mean of its divisors is an integer number (840578310).

Almost surely, 2^21410243544 is an apocalyptic number.

21410243544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21410243544 is an abundant number, since it is smaller than the sum of its proper divisors (32386768296).

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

21410243544 is a wasteful number, since it uses less digits than its factorization.

21410243544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000 (or 5996 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21410243544 its reverse (44534201412), we get a palindrome (65944444956).

The spelling of 21410243544 in words is "twenty-one billion, four hundred ten million, two hundred forty-three thousand, five hundred forty-four".