20303314212523 has 4 divisors (see below), whose sum is σ = 20321393745448. Its totient is φ = 20285234679600.

The previous prime is 20303314212499. The next prime is 20303314212541. The reversal of 20303314212523 is 32521241330302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20303314212523 is a prime.

It is a super-2 number, since 2×20303314212523² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20303314212023) 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, 9039764778 + ... + 9039767023.

It is an arithmetic number, because the mean of its divisors is an integer number (5080348436362).

Almost surely, 2^{20303314212523} is an apocalyptic number.

20303314212523 is a deficient number, since it is larger than the sum of its proper divisors (18079532925).

20303314212523 is a wasteful number, since it uses less digits than its factorization.

20303314212523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18079532924.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 20303314212523 its reverse (32521241330302), we get a palindrome (52824555542825).

The spelling of 20303314212523 in words is "twenty trillion, three hundred three billion, three hundred fourteen million, two hundred twelve thousand, five hundred twenty-three".