20204325491 has 8 divisors (see below), whose sum is σ = 23886887520. Its totient is φ = 16720820928.

The previous prime is 20204325481. The next prime is 20204325523. The reversal of 20204325491 is 19452340202.

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

It is a de Polignac number, because none of the positive numbers 2^k-20204325491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204325451) 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, 49764146 + ... + 49764551.

It is an arithmetic number, because the mean of its divisors is an integer number (2985860940).

Almost surely, 2^20204325491 is an apocalyptic number.

20204325491 is a deficient number, since it is larger than the sum of its proper divisors (3682562029).

20204325491 is an equidigital number, since it uses as much as digits as its factorization.

20204325491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99528733.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 20204325491 its reverse (19452340202), we get a palindrome (39656665693).

The spelling of 20204325491 in words is "twenty billion, two hundred four million, three hundred twenty-five thousand, four hundred ninety-one".