20163731023420 has 24 divisors (see below), whose sum is σ = 44184871461024. Its totient is φ = 7714818826176.

The previous prime is 20163731023379. The next prime is 20163731023421. The reversal of 20163731023420 is 2432013736102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163731023421) 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, 21917098479 + ... + 21917099398.

It is an arithmetic number, because the mean of its divisors is an integer number (1841036310876).

Almost surely, 2^{20163731023420} is an apocalyptic number.

20163731023420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20163731023420 is an abundant number, since it is smaller than the sum of its proper divisors (24021140437604).

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

20163731023420 is a wasteful number, since it uses less digits than its factorization.

20163731023420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43834197909 (or 43834197907 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 20163731023420 its reverse (2432013736102), we get a palindrome (22595744759522).

The spelling of 20163731023420 in words is "twenty trillion, one hundred sixty-three billion, seven hundred thirty-one million, twenty-three thousand, four hundred twenty".