21700624111487 has 2 divisors, whose sum is σ = 21700624111488. Its totient is φ = 21700624111486.

The previous prime is 21700624111421. The next prime is 21700624111501. The reversal of 21700624111487 is 78411142600712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21700624111487 - 2²² = 21700619917183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21700624111087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10850312055743 + 10850312055744.

It is an arithmetic number, because the mean of its divisors is an integer number (10850312055744).

Almost surely, 2^{21700624111487} is an apocalyptic number.

21700624111487 is a deficient number, since it is larger than the sum of its proper divisors (1).

21700624111487 is an equidigital number, since it uses as much as digits as its factorization.

21700624111487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 21700624111487 in words is "twenty-one trillion, seven hundred billion, six hundred twenty-four million, one hundred eleven thousand, four hundred eighty-seven".