20238229186564 has 6 divisors (see below), whose sum is σ = 35416901076494. Its totient is φ = 10119114593280.

The previous prime is 20238229186543. The next prime is 20238229186631. The reversal of 20238229186564 is 46568192283202.

It can be written as a sum of positive squares in only one way, i.e., 14270322201664 + 5967906984900 = 3777608^2 + 2442930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20238229186499 and 20238229186508.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2529778648317 + ... + 2529778648324.

Almost surely, 2^{20238229186564} is an apocalyptic number.

It is an amenable number.

20238229186564 is a deficient number, since it is larger than the sum of its proper divisors (15178671889930).

20238229186564 is a wasteful number, since it uses less digits than its factorization.

20238229186564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5059557296645 (or 5059557296643 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 20238229186564 in words is "twenty trillion, two hundred thirty-eight billion, two hundred twenty-nine million, one hundred eighty-six thousand, five hundred sixty-four".