20123210993 has 16 divisors (see below), whose sum is σ = 20699152320. Its totient is φ = 19552446144.

The previous prime is 20123210957. The next prime is 20123211019. The reversal of 20123210993 is 39901232102.

It is a cyclic number.

It is not a de Polignac number, because 20123210993 - 2⁶ = 20123210929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123210893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9233978 + ... + 9236156.

It is an arithmetic number, because the mean of its divisors is an integer number (1293697020).

Almost surely, 2^20123210993 is an apocalyptic number.

It is an amenable number.

20123210993 is a deficient number, since it is larger than the sum of its proper divisors (575941327).

20123210993 is a wasteful number, since it uses less digits than its factorization.

20123210993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 20123210993 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, nine hundred ninety-three".