21445100245040 has 40 divisors (see below), whose sum is σ = 51207421808400. Its totient is φ = 8346201175296.

The previous prime is 21445100245013. The next prime is 21445100245061. The reversal of 21445100245040 is 4054200154412.

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 = 21445100244988 and 21445100245006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3622480190 + ... + 3622486109.

It is an arithmetic number, because the mean of its divisors is an integer number (1280185545210).

Almost surely, 2^{21445100245040} is an apocalyptic number.

21445100245040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21445100245040 is an abundant number, since it is smaller than the sum of its proper divisors (29762321563360).

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

21445100245040 is a wasteful number, since it uses less digits than its factorization.

21445100245040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244966349 (or 7244966343 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 21445100245040 its reverse (4054200154412), we get a palindrome (25499300399452).

The spelling of 21445100245040 in words is "twenty-one trillion, four hundred forty-five billion, one hundred million, two hundred forty-five thousand, forty".