21440003242040 has 64 divisors (see below), whose sum is σ = 48359327940000. Its totient is φ = 8554813603840.

The previous prime is 21440003242027. The next prime is 21440003242169. The reversal of 21440003242040 is 4024230004412.

It is a happy number.

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, 27263960 + ... + 28039320.

Almost surely, 2^{21440003242040} is an apocalyptic number.

21440003242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21440003242040 is an abundant number, since it is smaller than the sum of its proper divisors (26919324697960).

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

21440003242040 is a wasteful number, since it uses less digits than its factorization.

21440003242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777080 (or 777076 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21440003242040 its reverse (4024230004412), we get a palindrome (25464233246452).

The spelling of 21440003242040 in words is "twenty-one trillion, four hundred forty billion, three million, two hundred forty-two thousand, forty".