21109600093 has 2 divisors, whose sum is σ = 21109600094. Its totient is φ = 21109600092.

The previous prime is 21109600027. The next prime is 21109600103. The reversal of 21109600093 is 39000690112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15604256889 + 5505343204 = 124917^2 + 74198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21109600093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21109600003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10554800046 + 10554800047.

It is an arithmetic number, because the mean of its divisors is an integer number (10554800047).

Almost surely, 2^21109600093 is an apocalyptic number.

It is an amenable number.

21109600093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21109600093 is an equidigital number, since it uses as much as digits as its factorization.

21109600093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 21109600093 in words is "twenty-one billion, one hundred nine million, six hundred thousand, ninety-three".