21014402061552 has 80 divisors (see below), whose sum is σ = 55304017042560. Its totient is φ = 6874015046400.

The previous prime is 21014402061509. The next prime is 21014402061571. The reversal of 21014402061552 is 25516020441012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4880599 + ... + 8114742.

It is an arithmetic number, because the mean of its divisors is an integer number (691300213032).

Almost surely, 2^{21014402061552} is an apocalyptic number.

It is an amenable number.

21014402061552 is an abundant number, since it is smaller than the sum of its proper divisors (34289614981008).

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

21014402061552 is a wasteful number, since it uses less digits than its factorization.

21014402061552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995982 (or 12995976 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 21014402061552 in words is "twenty-one trillion, fourteen billion, four hundred two million, sixty-one thousand, five hundred fifty-two".