18966528001 has 4 divisors (see below), whose sum is σ = 18966933504. Its totient is φ = 18966122500.

The previous prime is 18966527971. The next prime is 18966528017. The reversal of 18966528001 is 10082566981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10082566981 = 8521 ⋅1183261.

It is a cyclic number.

It is not a de Polignac number, because 18966528001 - 2⁷ = 18966527873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18966528041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121825 + ... + 229726.

It is an arithmetic number, because the mean of its divisors is an integer number (4741733376).

Almost surely, 2^18966528001 is an apocalyptic number.

It is an amenable number.

18966528001 is a deficient number, since it is larger than the sum of its proper divisors (405503).

18966528001 is an equidigital number, since it uses as much as digits as its factorization.

18966528001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405502.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 18966528001 in words is "eighteen billion, nine hundred sixty-six million, five hundred twenty-eight thousand, one".