21754662582551 has 2 divisors, whose sum is σ = 21754662582552. Its totient is φ = 21754662582550.

The previous prime is 21754662582509. The next prime is 21754662582593. The reversal of 21754662582551 is 15528526645712.

It is a balanced prime because it is at equal distance from previous prime (21754662582509) and next prime (21754662582593).

It is a cyclic number.

It is not a de Polignac number, because 21754662582551 - 2¹⁴ = 21754662566167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21754662582451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10877331291275 + 10877331291276.

It is an arithmetic number, because the mean of its divisors is an integer number (10877331291276).

Almost surely, 2^{21754662582551} is an apocalyptic number.

21754662582551 is a deficient number, since it is larger than the sum of its proper divisors (1).

21754662582551 is an equidigital number, since it uses as much as digits as its factorization.

21754662582551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320000, while the sum is 59.

The spelling of 21754662582551 in words is "twenty-one trillion, seven hundred fifty-four billion, six hundred sixty-two million, five hundred eighty-two thousand, five hundred fifty-one".