18621563345007 has 32 divisors (see below), whose sum is σ = 29431167788544. Its totient is φ = 10250793648000.

The previous prime is 18621563344961. The next prime is 18621563345027. The reversal of 18621563345007 is 70054336512681.

It is not a de Polignac number, because 18621563345007 - 2¹⁰ = 18621563343983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18621563345027) 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, 118564969 + ... + 118721922.

It is an arithmetic number, because the mean of its divisors is an integer number (919723993392).

Almost surely, 2^{18621563345007} is an apocalyptic number.

18621563345007 is a deficient number, since it is larger than the sum of its proper divisors (10809604443537).

18621563345007 is a wasteful number, since it uses less digits than its factorization.

18621563345007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237287039.

The product of its (nonzero) digits is 3628800, while the sum is 51.

Adding to 18621563345007 its reverse (70054336512681), we get a palindrome (88675899857688).

The spelling of 18621563345007 in words is "eighteen trillion, six hundred twenty-one billion, five hundred sixty-three million, three hundred forty-five thousand, seven".