20670767965 has 8 divisors (see below), whose sum is σ = 25144715448. Its totient is φ = 16310085120.

The previous prime is 20670767963. The next prime is 20670768007. The reversal of 20670767965 is 56976707602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7768307044 + 12902460921 = 88138^2 + 113589^2 .

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

It is not a de Polignac number, because 20670767965 - 2¹ = 20670767963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670767963) 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, 28315756 + ... + 28316485.

It is an arithmetic number, because the mean of its divisors is an integer number (3143089431).

Almost surely, 2^20670767965 is an apocalyptic number.

It is an amenable number.

20670767965 is a deficient number, since it is larger than the sum of its proper divisors (4473947483).

20670767965 is an equidigital number, since it uses as much as digits as its factorization.

20670767965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56632319.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 20670767965 in words is "twenty billion, six hundred seventy million, seven hundred sixty-seven thousand, nine hundred sixty-five".