21467225662657 has 2 divisors, whose sum is σ = 21467225662658. Its totient is φ = 21467225662656.

The previous prime is 21467225662637. The next prime is 21467225662681. The reversal of 21467225662657 is 75626652276412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19529363993616 + 1937861669041 = 4419204^2 + 1392071^2 .

It is a cyclic number.

It is not a de Polignac number, because 21467225662657 - 2²³ = 21467217274049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21467225662595 and 21467225662604.

It is not a weakly prime, because it can be changed into another prime (21467225662637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733612831328 + 10733612831329.

It is an arithmetic number, because the mean of its divisors is an integer number (10733612831329).

Almost surely, 2^{21467225662657} is an apocalyptic number.

It is an amenable number.

21467225662657 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467225662657 is an equidigital number, since it uses as much as digits as its factorization.

21467225662657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101606400, while the sum is 61.

The spelling of 21467225662657 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred twenty-five million, six hundred sixty-two thousand, six hundred fifty-seven".