133220020 has 96 divisors (see below), whose sum is σ = 312238080. Its totient is φ = 47537280.

The previous prime is 133220011. The next prime is 133220027. The reversal of 133220020 is 20022331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506409 + ... + 506671.

It is an arithmetic number, because the mean of its divisors is an integer number (3252480).

Almost surely, 2^133220020 is an apocalyptic number.

133220020 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 133220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156119040).

133220020 is an abundant number, since it is smaller than the sum of its proper divisors (179018060).

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

133220020 is a wasteful number, since it uses less digits than its factorization.

133220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 133220020 is about 11542.0977296157. The cubic root of 133220020 is about 510.7281921188.

Adding to 133220020 its reverse (20022331), we get a palindrome (153242351).

The spelling of 133220020 in words is "one hundred thirty-three million, two hundred twenty thousand, twenty".