20123210995 has 16 divisors (see below), whose sum is σ = 24196388832. Its totient is φ = 16066252800.

The previous prime is 20123210957. The next prime is 20123211019. The reversal of 20123210995 is 59901232102.

It is not a de Polignac number, because 20123210995 - 2²⁷ = 19988993267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123210995.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7498924 + ... + 7501606.

It is an arithmetic number, because the mean of its divisors is an integer number (1512274302).

Almost surely, 2^20123210995 is an apocalyptic number.

20123210995 is a deficient number, since it is larger than the sum of its proper divisors (4073177837).

20123210995 is a wasteful number, since it uses less digits than its factorization.

20123210995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142.

The product of its (nonzero) digits is 9720, while the sum is 34.

The spelling of 20123210995 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, nine hundred ninety-five".