20304651215445 has 32 divisors (see below), whose sum is σ = 32545244565504. Its totient is φ = 10809892680000.

The previous prime is 20304651215441. The next prime is 20304651215449. The reversal of 20304651215445 is 54451215640302.

It is an interprime number because it is at equal distance from previous prime (20304651215441) and next prime (20304651215449).

It is not a de Polignac number, because 20304651215445 - 2² = 20304651215441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20304651215397 and 20304651215406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304651215441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24865600 + ... + 25669190.

It is an arithmetic number, because the mean of its divisors is an integer number (1017038892672).

Almost surely, 2^{20304651215445} is an apocalyptic number.

It is an amenable number.

20304651215445 is a deficient number, since it is larger than the sum of its proper divisors (12240593350059).

20304651215445 is a wasteful number, since it uses less digits than its factorization.

20304651215445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806593.

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 20304651215445 its reverse (54451215640302), we get a palindrome (74755866855747).

The spelling of 20304651215445 in words is "twenty trillion, three hundred four billion, six hundred fifty-one million, two hundred fifteen thousand, four hundred forty-five".