21377370043673 has 8 divisors (see below), whose sum is σ = 24431633549760. Its totient is φ = 18323194912560.

The previous prime is 21377370043657. The next prime is 21377370043703. The reversal of 21377370043673 is 37634007377312.

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

It is a cyclic number.

It is not a de Polignac number, because 21377370043673 - 2⁴ = 21377370043657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21377370043273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21574583 + ... + 22543676.

It is an arithmetic number, because the mean of its divisors is an integer number (3053954193720).

Almost surely, 2^{21377370043673} is an apocalyptic number.

It is an amenable number.

21377370043673 is a deficient number, since it is larger than the sum of its proper divisors (3054263506087).

21377370043673 is an equidigital number, since it uses as much as digits as its factorization.

21377370043673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44187487.

The product of its (nonzero) digits is 9335088, while the sum is 53.

The spelling of 21377370043673 in words is "twenty-one trillion, three hundred seventy-seven billion, three hundred seventy million, forty-three thousand, six hundred seventy-three".