20504351441 has 4 divisors (see below), whose sum is σ = 23433544512. Its totient is φ = 17575158372.

The previous prime is 20504351437. The next prime is 20504351447. The reversal of 20504351441 is 14415340502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20504351441 - 2² = 20504351437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20504351447) 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, 1464596525 + ... + 1464596538.

It is an arithmetic number, because the mean of its divisors is an integer number (5858386128).

Almost surely, 2^20504351441 is an apocalyptic number.

It is an amenable number.

20504351441 is a deficient number, since it is larger than the sum of its proper divisors (2929193071).

20504351441 is an equidigital number, since it uses as much as digits as its factorization.

20504351441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929193070.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20504351441 its reverse (14415340502), we get a palindrome (34919691943).

The spelling of 20504351441 in words is "twenty billion, five hundred four million, three hundred fifty-one thousand, four hundred forty-one".