133388881920 has 936 divisors, whose sum is σ = 558785301984. Its totient is φ = 30433148928.

The previous prime is 133388881919. The next prime is 133388881943. The reversal of 133388881920 is 29188883331.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 243855087 + ... + 243855633.

It is an arithmetic number, because the mean of its divisors is an integer number (596992844).

Almost surely, 2^133388881920 is an apocalyptic number.

133388881920 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 133388881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279392650992).

133388881920 is an abundant number, since it is smaller than the sum of its proper divisors (425396420064).

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

133388881920 is an frugal number, since it uses more digits than its factorization.

133388881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 133388881920 in words is "one hundred thirty-three billion, three hundred eighty-eight million, eight hundred eighty-one thousand, nine hundred twenty".