20412033209 has 4 divisors (see below), whose sum is σ = 20412352740. Its totient is φ = 20411713680.

The previous prime is 20412033181. The next prime is 20412033233. The reversal of 20412033209 is 90233021402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90233021402 = 2 ⋅45116510701.

It can be written as a sum of positive squares in 2 ways, for example, as 6233892025 + 14178141184 = 78955^2 + 119072^2 .

It is a cyclic number.

It is not a de Polignac number, because 20412033209 - 2¹⁶ = 20411967673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20412053209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27374 + ... + 203895.

It is an arithmetic number, because the mean of its divisors is an integer number (5103088185).

Almost surely, 2^20412033209 is an apocalyptic number.

It is an amenable number.

20412033209 is a deficient number, since it is larger than the sum of its proper divisors (319531).

20412033209 is an equidigital number, since it uses as much as digits as its factorization.

20412033209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319530.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20412033209 in words is "twenty billion, four hundred twelve million, thirty-three thousand, two hundred nine".