20165173646420 has 48 divisors (see below), whose sum is σ = 46196931529728. Its totient is φ = 7332734559360.

The previous prime is 20165173646407. The next prime is 20165173646437. The reversal of 20165173646420 is 2464637156102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38299469 + ... + 38822411.

It is an arithmetic number, because the mean of its divisors is an integer number (962436073536).

Almost surely, 2^{20165173646420} is an apocalyptic number.

20165173646420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20165173646420 is an abundant number, since it is smaller than the sum of its proper divisors (26031757883308).

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

20165173646420 is a wasteful number, since it uses less digits than its factorization.

20165173646420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698240 (or 698238 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 20165173646420 in words is "twenty trillion, one hundred sixty-five billion, one hundred seventy-three million, six hundred forty-six thousand, four hundred twenty".