21755307230174 has 16 divisors (see below), whose sum is σ = 37302050013408. Its totient is φ = 9321893693952.

The previous prime is 21755307230159. The next prime is 21755307230191. The reversal of 21755307230174 is 47103270355712.

It is a super-2 number, since 2×21755307230174² (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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150709007 + ... + 150853290.

It is an arithmetic number, because the mean of its divisors is an integer number (2331378125838).

Almost surely, 2^{21755307230174} is an apocalyptic number.

21755307230174 is a deficient number, since it is larger than the sum of its proper divisors (15546742783234).

21755307230174 is a wasteful number, since it uses less digits than its factorization.

21755307230174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301567459.

The product of its (nonzero) digits is 1234800, while the sum is 47.

Adding to 21755307230174 its reverse (47103270355712), we get a palindrome (68858577585886).

The spelling of 21755307230174 in words is "twenty-one trillion, seven hundred fifty-five billion, three hundred seven million, two hundred thirty thousand, one hundred seventy-four".