21182910093 has 24 divisors (see below), whose sum is σ = 31939584768. Its totient is φ = 13502984352.

The previous prime is 21182909983. The next prime is 21182910107. The reversal of 21182910093 is 39001928112.

It is not a de Polignac number, because 21182910093 - 2⁹ = 21182909581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21182910493) 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 in 23 ways as a sum of consecutive naturals, for example, 594796 + ... + 629402.

It is an arithmetic number, because the mean of its divisors is an integer number (1330816032).

Almost surely, 2^21182910093 is an apocalyptic number.

21182910093 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21182910093 is a deficient number, since it is larger than the sum of its proper divisors (10756674675).

21182910093 is a wasteful number, since it uses less digits than its factorization.

21182910093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37593 (or 37590 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 21182910093 in words is "twenty-one billion, one hundred eighty-two million, nine hundred ten thousand, ninety-three".