33434918981 has 4 divisors (see below), whose sum is σ = 33462946092. Its totient is φ = 33406891872.

The previous prime is 33434918939. The next prime is 33434919019. The reversal of 33434918981 is 18981943433.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11450926081 + 21983992900 = 107009^2 + 148270^2 .

It is a cyclic number.

It is not a de Polignac number, because 33434918981 - 2⁶ = 33434918917 is a prime.

It is a super-2 number, since 2×33434918981² (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 (33434918381) 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, 14011766 + ... + 14014151.

It is an arithmetic number, because the mean of its divisors is an integer number (8365736523).

Almost surely, 2^33434918981 is an apocalyptic number.

It is an amenable number.

33434918981 is a deficient number, since it is larger than the sum of its proper divisors (28027111).

33434918981 is a wasteful number, since it uses less digits than its factorization.

33434918981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28027110.

The product of its digits is 2239488, while the sum is 53.

The spelling of 33434918981 in words is "thirty-three billion, four hundred thirty-four million, nine hundred eighteen thousand, nine hundred eighty-one".