21467745126305 has 12 divisors (see below), whose sum is σ = 26029612502460. Its totient is φ = 16997142495744.

The previous prime is 21467745126281. The next prime is 21467745126307. The reversal of 21467745126305 is 50362154776412.

It can be written as a sum of positive squares in 6 ways, for example, as 439293235264 + 21028451891041 = 662792^2 + 4585679^2 .

It is not a de Polignac number, because 21467745126305 - 2³⁸ = 21192867219361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21467745126307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228114770 + ... + 228208859.

It is an arithmetic number, because the mean of its divisors is an integer number (2169134375205).

Almost surely, 2^{21467745126305} is an apocalyptic number.

It is an amenable number.

21467745126305 is a deficient number, since it is larger than the sum of its proper divisors (4561867376155).

21467745126305 is an frugal number, since it uses more digits than its factorization.

21467745126305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456323828 (or 456323731 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 21467745126305 in words is "twenty-one trillion, four hundred sixty-seven billion, seven hundred forty-five million, one hundred twenty-six thousand, three hundred five".