133408940820 has 96 divisors (see below), whose sum is σ = 385718108160. Its totient is φ = 34417111680.

The previous prime is 133408940761. The next prime is 133408940839. The reversal of 133408940820 is 28049804331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6944949 + ... + 6964131.

It is an arithmetic number, because the mean of its divisors is an integer number (4017896960).

Almost surely, 2^133408940820 is an apocalyptic number.

133408940820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133408940820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192859054080).

133408940820 is an abundant number, since it is smaller than the sum of its proper divisors (252309167340).

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

133408940820 is a wasteful number, since it uses less digits than its factorization.

133408940820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22965 (or 22963 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 133408940820 in words is "one hundred thirty-three billion, four hundred eight million, nine hundred forty thousand, eight hundred twenty".