2009593096921 has 2 divisors, whose sum is σ = 2009593096922. Its totient is φ = 2009593096920.

The previous prime is 2009593096919. The next prime is 2009593096933. The reversal of 2009593096921 is 1296903959002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1981548905625 + 28044191296 = 1407675^2 + 167464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009593096921 - 2¹ = 2009593096919 is a prime.

Together with 2009593096919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2009593094921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004796548460 + 1004796548461.

It is an arithmetic number, because the mean of its divisors is an integer number (1004796548461).

Almost surely, 2^{2009593096921} is an apocalyptic number.

It is an amenable number.

2009593096921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009593096921 is an equidigital number, since it uses as much as digits as its factorization.

2009593096921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The spelling of 2009593096921 in words is "two trillion, nine billion, five hundred ninety-three million, ninety-six thousand, nine hundred twenty-one".