20240666133457 has 32 divisors (see below), whose sum is σ = 25472152249344. Its totient is φ = 15623813947200.

The previous prime is 20240666133439. The next prime is 20240666133509. The reversal of 20240666133457 is 75433166604202.

It is a cyclic number.

It is not a de Polignac number, because 20240666133457 - 2¹⁹ = 20240665609169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20240666133457.

It is not an unprimeable number, because it can be changed into a prime (20240666133157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232980207 + ... + 233067067.

It is an arithmetic number, because the mean of its divisors is an integer number (796004757792).

Almost surely, 2^{20240666133457} is an apocalyptic number.

It is an amenable number.

20240666133457 is a deficient number, since it is larger than the sum of its proper divisors (5231486115887).

20240666133457 is a wasteful number, since it uses less digits than its factorization.

20240666133457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115269.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 20240666133457 in words is "twenty trillion, two hundred forty billion, six hundred sixty-six million, one hundred thirty-three thousand, four hundred fifty-seven".