20091093 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 11247360.

The previous prime is 20091067. The next prime is 20091101. The reversal of 20091093 is 39019002.

It is a happy number.

It is not a de Polignac number, because 20091093 - 2²² = 15896789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32796 + ... + 33402.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^20091093 is an apocalyptic number.

It is an amenable number.

20091093 is a deficient number, since it is larger than the sum of its proper divisors (11427627).

20091093 is a wasteful number, since it uses less digits than its factorization.

20091093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 20091093 is about 4482.3088916316. The cubic root of 20091093 is about 271.8532449761.

The spelling of 20091093 in words is "twenty million, ninety-one thousand, ninety-three".