21746364420745 has 8 divisors (see below), whose sum is σ = 26095664646720. Its totient is φ = 17397073308720.

The previous prime is 21746364420701. The next prime is 21746364420769. The reversal of 21746364420745 is 54702446364712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21746364420745 - 2⁷ = 21746364420617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5205690 + ... + 8401900.

It is an arithmetic number, because the mean of its divisors is an integer number (3261958080840).

Almost surely, 2^{21746364420745} is an apocalyptic number.

It is an amenable number.

21746364420745 is a deficient number, since it is larger than the sum of its proper divisors (4349300225975).

21746364420745 is a wasteful number, since it uses less digits than its factorization.

21746364420745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556975.

The product of its (nonzero) digits is 27095040, while the sum is 55.

The spelling of 21746364420745 in words is "twenty-one trillion, seven hundred forty-six billion, three hundred sixty-four million, four hundred twenty thousand, seven hundred forty-five".