20312102109 has 16 divisors (see below), whose sum is σ = 29375931200. Its totient is φ = 12409825536.

The previous prime is 20312102087. The next prime is 20312102119. The reversal of 20312102109 is 90120121302.

It is not a de Polignac number, because 20312102109 - 2¹⁹ = 20311577821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312102119) 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, 1868044 + ... + 1878885.

It is an arithmetic number, because the mean of its divisors is an integer number (1835995700).

Almost surely, 2^20312102109 is an apocalyptic number.

It is an amenable number.

20312102109 is a deficient number, since it is larger than the sum of its proper divisors (9063829091).

20312102109 is a wasteful number, since it uses less digits than its factorization.

20312102109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747084.

The product of its (nonzero) digits is 216, while the sum is 21.

The spelling of 20312102109 in words is "twenty billion, three hundred twelve million, one hundred two thousand, one hundred nine".