20164432032550 has 192 divisors, whose sum is σ = 43946274758400. Its totient is φ = 6820233177600.

The previous prime is 20164432032541. The next prime is 20164432032571. The reversal of 20164432032550 is 5523023446102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 44220817 + ... + 44674483.

It is an arithmetic number, because the mean of its divisors is an integer number (228886847700).

Almost surely, 2^{20164432032550} is an apocalyptic number.

20164432032550 is an abundant number, since it is smaller than the sum of its proper divisors (23781842725850).

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

20164432032550 is a wasteful number, since it uses less digits than its factorization.

20164432032550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453831 (or 453826 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 20164432032550 its reverse (5523023446102), we get a palindrome (25687455478652).

The spelling of 20164432032550 in words is "twenty trillion, one hundred sixty-four billion, four hundred thirty-two million, thirty-two thousand, five hundred fifty".