21364171447770 has 48 divisors (see below), whose sum is σ = 55572912356832. Its totient is φ = 5694438889440.

The previous prime is 21364171447769. The next prime is 21364171447841. The reversal of 21364171447770 is 7774417146312.

21364171447770 is a `hidden beast` number, since 2 + 1 + 3 + 64 + 1 + 71 + 447 + 7 + 70 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55504992 + ... + 55888571.

It is an arithmetic number, because the mean of its divisors is an integer number (1157769007434).

Almost surely, 2^{21364171447770} is an apocalyptic number.

21364171447770 is an abundant number, since it is smaller than the sum of its proper divisors (34208740909062).

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

21364171447770 is a wasteful number, since it uses less digits than its factorization.

21364171447770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111395707 (or 111395704 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 54.

The spelling of 21364171447770 in words is "twenty-one trillion, three hundred sixty-four billion, one hundred seventy-one million, four hundred forty-seven thousand, seven hundred seventy".