20210112309 has 8 divisors (see below), whose sum is σ = 26948969152. Its totient is φ = 13472331840.

The previous prime is 20210112277. The next prime is 20210112313. The reversal of 20210112309 is 90321101202.

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

It is not a de Polignac number, because 20210112309 - 2⁵ = 20210112277 is a prime.

It is a super-2 number, since 2×20210112309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210112389) 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, 224212 + ... + 301149.

It is an arithmetic number, because the mean of its divisors is an integer number (3368621144).

Almost surely, 2^20210112309 is an apocalyptic number.

It is an amenable number.

20210112309 is a deficient number, since it is larger than the sum of its proper divisors (6738856843).

20210112309 is a wasteful number, since it uses less digits than its factorization.

20210112309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538187.

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

The spelling of 20210112309 in words is "twenty billion, two hundred ten million, one hundred twelve thousand, three hundred nine".