21441257155552 has 48 divisors (see below), whose sum is σ = 45476661656160. Its totient is φ = 9892248233472.

The previous prime is 21441257155501. The next prime is 21441257155603. The reversal of 21441257155552 is 25555175214412.

It is an interprime number because it is at equal distance from previous prime (21441257155501) and next prime (21441257155603).

It is a junction number, because it is equal to n+sod(n) for n = 21441257155496 and 21441257155505.

It is a congruent number.

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, 8569527 + ... + 10785142.

It is an arithmetic number, because the mean of its divisors is an integer number (947430451170).

Almost surely, 2^{21441257155552} is an apocalyptic number.

It is an amenable number.

21441257155552 is an abundant number, since it is smaller than the sum of its proper divisors (24035404500608).

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

21441257155552 is a wasteful number, since it uses less digits than its factorization.

21441257155552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357355 (or 19357347 counting only the distinct ones).

The product of its digits is 2800000, while the sum is 49.

The spelling of 21441257155552 in words is "twenty-one trillion, four hundred forty-one billion, two hundred fifty-seven million, one hundred fifty-five thousand, five hundred fifty-two".