20163731023502 has 64 divisors (see below), whose sum is σ = 34599795425280. Its totient is φ = 8729233682400.

The previous prime is 20163731023481. The next prime is 20163731023511. The reversal of 20163731023502 is 20532013736102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49466399 + ... + 49872357.

It is an arithmetic number, because the mean of its divisors is an integer number (540621803520).

Almost surely, 2^{20163731023502} is an apocalyptic number.

20163731023502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20163731023502 is a deficient number, since it is larger than the sum of its proper divisors (14436064401778).

20163731023502 is a wasteful number, since it uses less digits than its factorization.

20163731023502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407157.

The product of its (nonzero) digits is 45360, while the sum is 35.

Adding to 20163731023502 its reverse (20532013736102), we get a palindrome (40695744759604).

The spelling of 20163731023502 in words is "twenty trillion, one hundred sixty-three billion, seven hundred thirty-one million, twenty-three thousand, five hundred two".