30733020 has 120 divisors (see below), whose sum is σ = 98306208. Its totient is φ = 8035200.

The previous prime is 30733009. The next prime is 30733033. The reversal of 30733020 is 2033703.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30732984 and 30733002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98665 + ... + 98975.

Almost surely, 2^30733020 is an apocalyptic number.

30733020 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 30733020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49153104).

30733020 is an abundant number, since it is smaller than the sum of its proper divisors (67573188).

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

30733020 is a wasteful number, since it uses less digits than its factorization.

30733020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 18.

The square root of 30733020 is about 5543.7370067491. The cubic root of 30733020 is about 313.2336512044.

Adding to 30733020 its reverse (2033703), we get a palindrome (32766723).

The spelling of 30733020 in words is "thirty million, seven hundred thirty-three thousand, twenty".