133103920 has 40 divisors (see below), whose sum is σ = 316671696. Its totient is φ = 52002048.

The previous prime is 133103899. The next prime is 133103923. The reversal of 133103920 is 29301331.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 133103891 and 133103900.

It is not an unprimeable number, because it can be changed into a prime (133103923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15907 + ... + 22786.

Almost surely, 2^133103920 is an apocalyptic number.

133103920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133103920 is an abundant number, since it is smaller than the sum of its proper divisors (183567776).

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

133103920 is a wasteful number, since it uses less digits than its factorization.

133103920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38749 (or 38743 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 133103920 is about 11537.0672183185. The cubic root of 133103920 is about 510.5797840527.

The spelling of 133103920 in words is "one hundred thirty-three million, one hundred three thousand, nine hundred twenty".