20212283765 has 4 divisors (see below), whose sum is σ = 24254740524. Its totient is φ = 16169827008.

The previous prime is 20212283761. The next prime is 20212283789. The reversal of 20212283765 is 56738221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5733215524 + 14479068241 = 75718^2 + 120329^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212283765 - 2² = 20212283761 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 (20212283761) 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, 2021228372 + ... + 2021228381.

It is an arithmetic number, because the mean of its divisors is an integer number (6063685131).

Almost surely, 2^20212283765 is an apocalyptic number.

It is an amenable number.

20212283765 is a deficient number, since it is larger than the sum of its proper divisors (4042456759).

20212283765 is an equidigital number, since it uses as much as digits as its factorization.

20212283765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042456758.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 20212283765 in words is "twenty billion, two hundred twelve million, two hundred eighty-three thousand, seven hundred sixty-five".