33705020 has 24 divisors (see below), whose sum is σ = 71839824. Its totient is φ = 13280256.

The previous prime is 33705019. The next prime is 33705043. The reversal of 33705020 is 2050733.

It is a super-2 number, since 2×33705020² = 2272056746400800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33704983 and 33705001.

It is a congruent number.

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, 11237 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (2993326).

Almost surely, 2^33705020 is an apocalyptic number.

It is an amenable number.

33705020 is an abundant number, since it is smaller than the sum of its proper divisors (38134804).

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

33705020 is a wasteful number, since it uses less digits than its factorization.

33705020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25229 (or 25227 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 33705020 is about 5805.6024665835. The cubic root of 33705020 is about 323.0215745349.

Adding to 33705020 its reverse (2050733), we get a palindrome (35755753).

The spelling of 33705020 in words is "thirty-three million, seven hundred five thousand, twenty".