20533351166000 has 80 divisors (see below), whose sum is σ = 49764841596288. Its totient is φ = 8194283648000.

The previous prime is 20533351165997. The next prime is 20533351166011. The reversal of 20533351166000 is 66115333502.

It is a tau number, because it is divible by the number of its divisors (80).

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, 11048297 + ... + 12772296.

Almost surely, 2^{20533351166000} is an apocalyptic number.

20533351166000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20533351166000 is an abundant number, since it is smaller than the sum of its proper divisors (29231490430288).

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

20533351166000 is a wasteful number, since it uses less digits than its factorization.

20533351166000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821047 (or 23821031 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 35.

Adding to 20533351166000 its reverse (66115333502), we get a palindrome (20599466499502).

The spelling of 20533351166000 in words is "twenty trillion, five hundred thirty-three billion, three hundred fifty-one million, one hundred sixty-six thousand".