33873242821 has 4 divisors (see below), whose sum is σ = 36952628544. Its totient is φ = 30793857100.

The previous prime is 33873242791. The next prime is 33873242827. The reversal of 33873242821 is 12824237833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33873242821 - 2¹¹ = 33873240773 is a prime.

It is a super-2 number, since 2×33873242821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33873242827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1539692845 + ... + 1539692866.

It is an arithmetic number, because the mean of its divisors is an integer number (9238157136).

Almost surely, 2^33873242821 is an apocalyptic number.

It is an amenable number.

33873242821 is a deficient number, since it is larger than the sum of its proper divisors (3079385723).

33873242821 is a wasteful number, since it uses less digits than its factorization.

33873242821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079385722.

The product of its digits is 387072, while the sum is 43.

The spelling of 33873242821 in words is "thirty-three billion, eight hundred seventy-three million, two hundred forty-two thousand, eight hundred twenty-one".