21154663060543 has 2 divisors, whose sum is σ = 21154663060544. Its totient is φ = 21154663060542.

The previous prime is 21154663060483. The next prime is 21154663060589. The reversal of 21154663060543 is 34506036645112.

It is an a-pointer prime, because the next prime (21154663060589) can be obtained adding 21154663060543 to its sum of digits (46).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21154663060543 - 2³⁷ = 21017224107071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21154663060493 and 21154663060502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21154663070543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10577331530271 + 10577331530272.

It is an arithmetic number, because the mean of its divisors is an integer number (10577331530272).

Almost surely, 2^{21154663060543} is an apocalyptic number.

21154663060543 is a deficient number, since it is larger than the sum of its proper divisors (1).

21154663060543 is an equidigital number, since it uses as much as digits as its factorization.

21154663060543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 21154663060543 in words is "twenty-one trillion, one hundred fifty-four billion, six hundred sixty-three million, sixty thousand, five hundred forty-three".