33993320513 has 4 divisors (see below), whose sum is σ = 35992927620. Its totient is φ = 31993713408.

The previous prime is 33993320503. The next prime is 33993320519. The reversal of 33993320513 is 31502339933.

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 22911968689 + 11081351824 = 151367^2 + 105268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33993320513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33993320519) 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, 999803528 + ... + 999803561.

It is an arithmetic number, because the mean of its divisors is an integer number (8998231905).

Almost surely, 2^33993320513 is an apocalyptic number.

It is an amenable number.

33993320513 is a deficient number, since it is larger than the sum of its proper divisors (1999607107).

33993320513 is a wasteful number, since it uses less digits than its factorization.

33993320513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999607106.

The product of its (nonzero) digits is 196830, while the sum is 41.

The spelling of 33993320513 in words is "thirty-three billion, nine hundred ninety-three million, three hundred twenty thousand, five hundred thirteen".