33520221340 has 24 divisors (see below), whose sum is σ = 70396144560. Its totient is φ = 13407387648.

The previous prime is 33520221313. The next prime is 33520221349. The reversal of 33520221340 is 4312202533.

It is a super-2 number, since 2×33520221340² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33520221349) 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, 534684 + ... + 594076.

It is an arithmetic number, because the mean of its divisors is an integer number (2933172690).

Almost surely, 2^33520221340 is an apocalyptic number.

It is an amenable number.

33520221340 is an abundant number, since it is smaller than the sum of its proper divisors (36875923220).

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

33520221340 is a wasteful number, since it uses less digits than its factorization.

33520221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87621 (or 87619 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 33520221340 its reverse (4312202533), we get a palindrome (37832423873).

The spelling of 33520221340 in words is "thirty-three billion, five hundred twenty million, two hundred twenty-one thousand, three hundred forty".