20238229186566 has 24 divisors (see below), whose sum is σ = 42997483465800. Its totient is φ = 6349248371712.

The previous prime is 20238229186543. The next prime is 20238229186631. The reversal of 20238229186566 is 66568192283202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5835704491 + ... + 5835707958.

It is an arithmetic number, because the mean of its divisors is an integer number (1791561811075).

Almost surely, 2^{20238229186566} is an apocalyptic number.

20238229186566 is an abundant number, since it is smaller than the sum of its proper divisors (22759254279234).

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

20238229186566 is a wasteful number, since it uses less digits than its factorization.

20238229186566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671412488 (or 11671412471 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 20238229186566 in words is "twenty trillion, two hundred thirty-eight billion, two hundred twenty-nine million, one hundred eighty-six thousand, five hundred sixty-six".