20223123309 has 80 divisors (see below), whose sum is σ = 32421417600. Its totient is φ = 12525456384.

The previous prime is 20223123289. The next prime is 20223123331. The reversal of 20223123309 is 90332132202.

20223123309 is a `hidden beast` number, since 20 + 22 + 312 + 3 + 309 = 666.

It is not a de Polignac number, because 20223123309 - 2⁹ = 20223122797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223123379) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 17911857 + ... + 17912985.

It is an arithmetic number, because the mean of its divisors is an integer number (405267720).

Almost surely, 2^20223123309 is an apocalyptic number.

It is an amenable number.

20223123309 is a deficient number, since it is larger than the sum of its proper divisors (12198294291).

20223123309 is a wasteful number, since it uses less digits than its factorization.

20223123309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The spelling of 20223123309 in words is "twenty billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred nine".