33140021 has 8 divisors (see below), whose sum is σ = 35178624. Its totient is φ = 31111360.

The previous prime is 33140017. The next prime is 33140027. The reversal of 33140021 is 12004133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33140021 - 2² = 33140017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33139978 and 33140005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33140027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5066 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (4397328).

Almost surely, 2^33140021 is an apocalyptic number.

It is an amenable number.

33140021 is a deficient number, since it is larger than the sum of its proper divisors (2038603).

33140021 is a wasteful number, since it uses less digits than its factorization.

33140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33140021 is about 5756.7370097999. The cubic root of 33140021 is about 321.2064516259.

Adding to 33140021 its reverse (12004133), we get a palindrome (45144154).

The spelling of 33140021 in words is "thirty-three million, one hundred forty thousand, twenty-one".