21045461265632 has 24 divisors (see below), whose sum is σ = 41502192423552. Its totient is φ = 10505221920000.

The previous prime is 21045461265629. The next prime is 21045461265643. The reversal of 21045461265632 is 23656216454012.

It is a super-2 number, since 2×21045461265632² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547127744 + ... + 547166207.

It is an arithmetic number, because the mean of its divisors is an integer number (1729258017648).

Almost surely, 2^{21045461265632} is an apocalyptic number.

It is an amenable number.

21045461265632 is a deficient number, since it is larger than the sum of its proper divisors (20456731157920).

21045461265632 is a wasteful number, since it uses less digits than its factorization.

21045461265632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094294562 (or 1094294554 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 21045461265632 in words is "twenty-one trillion, forty-five billion, four hundred sixty-one million, two hundred sixty-five thousand, six hundred thirty-two".