21442553025340 has 12 divisors (see below), whose sum is σ = 45029361353256. Its totient is φ = 8577021210128.

The previous prime is 21442553025329. The next prime is 21442553025389. The reversal of 21442553025340 is 4352035524412.

It is a junction number, because it is equal to n+sod(n) for n = 21442553025293 and 21442553025302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536063825614 + ... + 536063825653.

It is an arithmetic number, because the mean of its divisors is an integer number (3752446779438).

Almost surely, 2^{21442553025340} is an apocalyptic number.

21442553025340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442553025340 is an abundant number, since it is smaller than the sum of its proper divisors (23586808327916).

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

21442553025340 is a wasteful number, since it uses less digits than its factorization.

21442553025340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072127651276 (or 1072127651274 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 21442553025340 its reverse (4352035524412), we get a palindrome (25794588549752).

The spelling of 21442553025340 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-three million, twenty-five thousand, three hundred forty".