21427066457750 has 64 divisors (see below), whose sum is σ = 40578028807680. Its totient is φ = 8471677528800.

The previous prime is 21427066457747. The next prime is 21427066457809. The reversal of 21427066457750 is 5775466072412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6530087 + ... + 9246413.

It is an arithmetic number, because the mean of its divisors is an integer number (634031700120).

Almost surely, 2^{21427066457750} is an apocalyptic number.

21427066457750 is a deficient number, since it is larger than the sum of its proper divisors (19150962349930).

21427066457750 is a wasteful number, since it uses less digits than its factorization.

21427066457750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716710 (or 2716700 counting only the distinct ones).

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 21427066457750 in words is "twenty-one trillion, four hundred twenty-seven billion, sixty-six million, four hundred fifty-seven thousand, seven hundred fifty".