33521372993 has 2 divisors, whose sum is σ = 33521372994. Its totient is φ = 33521372992.

The previous prime is 33521372921. The next prime is 33521373019. The reversal of 33521372993 is 39927312533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32668032049 + 853340944 = 180743^2 + 29212^2 .

It is a cyclic number.

It is not a de Polignac number, because 33521372993 - 2¹⁰ = 33521371969 is a prime.

It is a super-2 number, since 2×33521372993² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33521371993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16760686496 + 16760686497.

It is an arithmetic number, because the mean of its divisors is an integer number (16760686497).

Almost surely, 2^33521372993 is an apocalyptic number.

It is an amenable number.

33521372993 is a deficient number, since it is larger than the sum of its proper divisors (1).

33521372993 is an equidigital number, since it uses as much as digits as its factorization.

33521372993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 47.

The spelling of 33521372993 in words is "thirty-three billion, five hundred twenty-one million, three hundred seventy-two thousand, nine hundred ninety-three".