21354670611427 has 2 divisors, whose sum is σ = 21354670611428. Its totient is φ = 21354670611426.

The previous prime is 21354670611353. The next prime is 21354670611431. The reversal of 21354670611427 is 72411607645312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21354670611427 - 2²³ = 21354662222819 is a prime.

It is a super-3 number, since 3×21354670611427³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21354670611437) by changing a digit.

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 as a sum of consecutive naturals, namely, 10677335305713 + 10677335305714.

It is an arithmetic number, because the mean of its divisors is an integer number (10677335305714).

Almost surely, 2^{21354670611427} is an apocalyptic number.

21354670611427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354670611427 is an equidigital number, since it uses as much as digits as its factorization.

21354670611427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 21354670611427 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventy million, six hundred eleven thousand, four hundred twenty-seven".