20431550012320 has 48 divisors (see below), whose sum is σ = 48273934389408. Its totient is φ = 8171875457280.

The previous prime is 20431550012317. The next prime is 20431550012339. The reversal of 20431550012320 is 2321005513402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4053366 + ... + 7569205.

It is an arithmetic number, because the mean of its divisors is an integer number (1005706966446).

Almost surely, 2^{20431550012320} is an apocalyptic number.

20431550012320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20431550012320 is an abundant number, since it is smaller than the sum of its proper divisors (27842384377088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431550012320 is a wasteful number, since it uses less digits than its factorization.

20431550012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11633573 (or 11633565 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20431550012320 its reverse (2321005513402), we get a palindrome (22752555525722).

The spelling of 20431550012320 in words is "twenty trillion, four hundred thirty-one billion, five hundred fifty million, twelve thousand, three hundred twenty".