21140014043440 has 40 divisors (see below), whose sum is σ = 49187739961728. Its totient is φ = 8449604359680.

The previous prime is 21140014043417. The next prime is 21140014043479. The reversal of 21140014043440 is 4434041004112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 21140014043399 and 21140014043408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99913312 + ... + 100124671.

Almost surely, 2^{21140014043440} is an apocalyptic number.

21140014043440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140014043440 is an abundant number, since it is smaller than the sum of its proper divisors (28047725918288).

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

21140014043440 is a wasteful number, since it uses less digits than its factorization.

21140014043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200039317 (or 200039311 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21140014043440 its reverse (4434041004112), we get a palindrome (25574055047552).

The spelling of 21140014043440 in words is "twenty-one trillion, one hundred forty billion, fourteen million, forty-three thousand, four hundred forty".