33130020 has 192 divisors, whose sum is σ = 118444032. Its totient is φ = 6720000.

The previous prime is 33130003. The next prime is 33130039. The reversal of 33130020 is 2003133.

Added to its reverse (2003133) it gives a triangular number (35133153 = T₈₃₈₂).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 33129978 and 33130005.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 327970 + ... + 328070.

It is an arithmetic number, because the mean of its divisors is an integer number (616896).

Almost surely, 2^33130020 is an apocalyptic number.

33130020 is a gapful number since it is divisible by the number (30) 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 33130020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59222016).

33130020 is an abundant number, since it is smaller than the sum of its proper divisors (85314012).

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

33130020 is a wasteful number, since it uses less digits than its factorization.

33130020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 33130020 is about 5755.8683098209. The cubic root of 33130020 is about 321.1741371330.

Adding to 33130020 its reverse (2003133), we get a palindrome (35133153).

The spelling of 33130020 in words is "thirty-three million, one hundred thirty thousand, twenty".