23040221523409 has 2 divisors, whose sum is σ = 23040221523410. Its totient is φ = 23040221523408.

The previous prime is 23040221523391. The next prime is 23040221523479. The reversal of 23040221523409 is 90432512204032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15016865025600 + 8023356497809 = 3875160^2 + 2832553^2 .

It is a cyclic number.

It is not a de Polignac number, because 23040221523409 - 2³⁹ = 22490465709521 is a prime.

It is not a weakly prime, because it can be changed into another prime (23040221523479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11520110761704 + 11520110761705.

It is an arithmetic number, because the mean of its divisors is an integer number (11520110761705).

Almost surely, 2^{23040221523409} is an apocalyptic number.

It is an amenable number.

23040221523409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23040221523409 is an equidigital number, since it uses as much as digits as its factorization.

23040221523409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 23040221523409 in words is "twenty-three trillion, forty billion, two hundred twenty-one million, five hundred twenty-three thousand, four hundred nine".