33545523421 has 4 divisors (see below), whose sum is σ = 33566143072. Its totient is φ = 33524903772.

The previous prime is 33545523337. The next prime is 33545523443. The reversal of 33545523421 is 12432554533.

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 33545523421 - 2⁹ = 33545522909 is a prime.

It is a super-2 number, since 2×33545523421² (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 (33545523721) 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, 10307385 + ... + 10310638.

It is an arithmetic number, because the mean of its divisors is an integer number (8391535768).

Almost surely, 2^33545523421 is an apocalyptic number.

It is an amenable number.

33545523421 is a deficient number, since it is larger than the sum of its proper divisors (20619651).

33545523421 is a wasteful number, since it uses less digits than its factorization.

33545523421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20619650.

The product of its digits is 216000, while the sum is 37.

The spelling of 33545523421 in words is "thirty-three billion, five hundred forty-five million, five hundred twenty-three thousand, four hundred twenty-one".