20633120605 has 4 divisors (see below), whose sum is σ = 24759744732. Its totient is φ = 16506496480.

The previous prime is 20633120597. The next prime is 20633120617. The reversal of 20633120605 is 50602133602.

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 7036860996 + 13596259609 = 83886^2 + 116603^2 .

It is not a de Polignac number, because 20633120605 - 2³ = 20633120597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2063312056 + ... + 2063312065.

It is an arithmetic number, because the mean of its divisors is an integer number (6189936183).

Almost surely, 2^20633120605 is an apocalyptic number.

It is an amenable number.

20633120605 is a deficient number, since it is larger than the sum of its proper divisors (4126624127).

20633120605 is an equidigital number, since it uses as much as digits as its factorization.

20633120605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126624126.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 20633120605 in words is "twenty billion, six hundred thirty-three million, one hundred twenty thousand, six hundred five".