33218028685 has 16 divisors (see below), whose sum is σ = 42195162240. Its totient is φ = 25061359680.

The previous prime is 33218028607. The next prime is 33218028707. The reversal of 33218028685 is 58682081233.

It is a happy number.

It is not a de Polignac number, because 33218028685 - 2²¹ = 33215931533 is a prime.

It is a super-2 number, since 2×33218028685² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2657601 + ... + 2670070.

It is an arithmetic number, because the mean of its divisors is an integer number (2637197640).

Almost surely, 2^33218028685 is an apocalyptic number.

It is an amenable number.

33218028685 is a deficient number, since it is larger than the sum of its proper divisors (8977133555).

33218028685 is a wasteful number, since it uses less digits than its factorization.

33218028685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327748.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 33218028685 in words is "thirty-three billion, two hundred eighteen million, twenty-eight thousand, six hundred eighty-five".