33021938 has 4 divisors (see below), whose sum is σ = 49532910. Its totient is φ = 16510968.

The previous prime is 33021931. The next prime is 33021959. The reversal of 33021938 is 83912033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25030009 + 7991929 = 5003^2 + 2827^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 33021938.

It is not an unprimeable number, because it can be changed into a prime (33021931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8255483 + ... + 8255486.

Almost surely, 2^33021938 is an apocalyptic number.

33021938 is a deficient number, since it is larger than the sum of its proper divisors (16510972).

33021938 is a wasteful number, since it uses less digits than its factorization.

33021938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16510971.

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

The square root of 33021938 is about 5746.4717871055. The cubic root of 33021938 is about 320.8244949197.

The spelling of 33021938 in words is "thirty-three million, twenty-one thousand, nine hundred thirty-eight".