133123020 has 48 divisors (see below), whose sum is σ = 373621248. Its totient is φ = 35416000.

The previous prime is 133123013. The next prime is 133123027. The reversal of 133123020 is 20321331.

It is an interprime number because it is at equal distance from previous prime (133123013) and next prime (133123027).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (133123027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25645 + ... + 30395.

It is an arithmetic number, because the mean of its divisors is an integer number (7783776).

Almost surely, 2^133123020 is an apocalyptic number.

133123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133123020 is an abundant number, since it is smaller than the sum of its proper divisors (240498228).

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

133123020 is a wasteful number, since it uses less digits than its factorization.

133123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 133123020 is about 11537.8949553201. The cubic root of 133123020 is about 510.6042050901.

Adding to 133123020 its reverse (20321331), we get a palindrome (153444351).

The spelling of 133123020 in words is "one hundred thirty-three million, one hundred twenty-three thousand, twenty".