21455003041340 has 24 divisors (see below), whose sum is σ = 49151461513392. Its totient is φ = 7801819287680.

The previous prime is 21455003041253. The next prime is 21455003041403. The reversal of 21455003041340 is 4314030055412.

It is a junction number, because it is equal to n+sod(n) for n = 21455003041297 and 21455003041306.

It is a congruent number.

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, 48761370329 + ... + 48761370768.

It is an arithmetic number, because the mean of its divisors is an integer number (2047977563058).

Almost surely, 2^{21455003041340} is an apocalyptic number.

21455003041340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21455003041340 is an abundant number, since it is smaller than the sum of its proper divisors (27696458472052).

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

21455003041340 is a wasteful number, since it uses less digits than its factorization.

21455003041340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97522741117 (or 97522741115 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 21455003041340 its reverse (4314030055412), we get a palindrome (25769033096752).

The spelling of 21455003041340 in words is "twenty-one trillion, four hundred fifty-five billion, three million, forty-one thousand, three hundred forty".