33218930 has 16 divisors (see below), whose sum is σ = 60127704. Its totient is φ = 13213440.

The previous prime is 33218903. The next prime is 33218951. The reversal of 33218930 is 3981233.

It can be written as a sum of positive squares in 4 ways, for example, as 6355441 + 26863489 = 2521^2 + 5183^2 .

It is a super-2 number, since 2×33218930² = 2206994620689800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33218893 and 33218902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7367 + ... + 10986.

Almost surely, 2^33218930 is an apocalyptic number.

33218930 is a deficient number, since it is larger than the sum of its proper divisors (26908774).

33218930 is a wasteful number, since it uses less digits than its factorization.

33218930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18541.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 33218930 is about 5763.5865569973. The cubic root of 33218930 is about 321.4611888358.

The spelling of 33218930 in words is "thirty-three million, two hundred eighteen thousand, nine hundred thirty".