20306033324551 has 24 divisors (see below), whose sum is σ = 24437182778064. Its totient is φ = 16712943770880.

The previous prime is 20306033324509. The next prime is 20306033324573. The reversal of 20306033324551 is 15542333060302.

It is a de Polignac number, because none of the positive numbers 2^k-20306033324551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20306033324551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306033324251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127181305 + ... + 127340866.

It is an arithmetic number, because the mean of its divisors is an integer number (1018215949086).

Almost surely, 2^{20306033324551} is an apocalyptic number.

20306033324551 is a deficient number, since it is larger than the sum of its proper divisors (4131149453513).

20306033324551 is a wasteful number, since it uses less digits than its factorization.

20306033324551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254522239 (or 254522220 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 37.

Adding to 20306033324551 its reverse (15542333060302), we get a palindrome (35848366384853).

The spelling of 20306033324551 in words is "twenty trillion, three hundred six billion, thirty-three million, three hundred twenty-four thousand, five hundred fifty-one".