21548101093 has 2 divisors, whose sum is σ = 21548101094. Its totient is φ = 21548101092.

The previous prime is 21548101061. The next prime is 21548101111. The reversal of 21548101093 is 39010184512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16451140644 + 5096960449 = 128262^2 + 71393^2 .

It is a cyclic number.

It is not a de Polignac number, because 21548101093 - 2⁵ = 21548101061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21548101493) 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, 10774050546 + 10774050547.

It is an arithmetic number, because the mean of its divisors is an integer number (10774050547).

Almost surely, 2^21548101093 is an apocalyptic number.

It is an amenable number.

21548101093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21548101093 is an equidigital number, since it uses as much as digits as its factorization.

21548101093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 21548101093 in words is "twenty-one billion, five hundred forty-eight million, one hundred one thousand, ninety-three".