20541844265 has 4 divisors (see below), whose sum is σ = 24650213124. Its totient is φ = 16433475408.

The previous prime is 20541844261. The next prime is 20541844273. The reversal of 20541844265 is 56244814502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56244814502 = 2 ⋅28122407251.

It can be written as a sum of positive squares in 2 ways, for example, as 7865561344 + 12676282921 = 88688^2 + 112589^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541844265 - 2² = 20541844261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541844261) 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, 2054184422 + ... + 2054184431.

It is an arithmetic number, because the mean of its divisors is an integer number (6162553281).

Almost surely, 2^20541844265 is an apocalyptic number.

It is an amenable number.

20541844265 is a deficient number, since it is larger than the sum of its proper divisors (4108368859).

20541844265 is an equidigital number, since it uses as much as digits as its factorization.

20541844265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4108368858.

The product of its (nonzero) digits is 307200, while the sum is 41.

The spelling of 20541844265 in words is "twenty billion, five hundred forty-one million, eight hundred forty-four thousand, two hundred sixty-five".