20233213209 has 16 divisors (see below), whose sum is σ = 32700143040. Its totient is φ = 12262553280.

The previous prime is 20233213201. The next prime is 20233213213. The reversal of 20233213209 is 90231233202.

20233213209 is a `hidden beast` number, since 2 + 0 + 2 + 332 + 1 + 320 + 9 = 666.

It is not a de Polignac number, because 20233213209 - 2³ = 20233213201 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20233213201) 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, 34062352 + ... + 34062945.

It is an arithmetic number, because the mean of its divisors is an integer number (2043758940).

Almost surely, 2^20233213209 is an apocalyptic number.

It is an amenable number.

20233213209 is a deficient number, since it is larger than the sum of its proper divisors (12466929831).

20233213209 is a wasteful number, since it uses less digits than its factorization.

20233213209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68125317 (or 68125311 counting only the distinct ones).

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

The spelling of 20233213209 in words is "twenty billion, two hundred thirty-three million, two hundred thirteen thousand, two hundred nine".