20109523393 has 8 divisors (see below), whose sum is σ = 20768604416. Its totient is φ = 19451091600.

The previous prime is 20109523381. The next prime is 20109523409. The reversal of 20109523393 is 39332590102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20109523393 - 2¹⁷ = 20109392321 is a prime.

It is a super-2 number, since 2×20109523393² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20109523793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98946 + ... + 223627.

It is an arithmetic number, because the mean of its divisors is an integer number (2596075552).

Almost surely, 2^20109523393 is an apocalyptic number.

It is an amenable number.

20109523393 is a deficient number, since it is larger than the sum of its proper divisors (659081023).

20109523393 is a wasteful number, since it uses less digits than its factorization.

20109523393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324615.

The product of its (nonzero) digits is 43740, while the sum is 37.

The spelling of 20109523393 in words is "twenty billion, one hundred nine million, five hundred twenty-three thousand, three hundred ninety-three".