18620351093 has 2 divisors, whose sum is σ = 18620351094. Its totient is φ = 18620351092.

The previous prime is 18620350993. The next prime is 18620351137. The reversal of 18620351093 is 39015302681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9494943364 + 9125407729 = 97442^2 + 95527^2 .

It is a cyclic number.

It is not a de Polignac number, because 18620351093 - 2¹⁰ = 18620350069 is a prime.

It is a super-3 number, since 3×18620351093³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18620350093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310175546 + 9310175547.

It is an arithmetic number, because the mean of its divisors is an integer number (9310175547).

Almost surely, 2^18620351093 is an apocalyptic number.

It is an amenable number.

18620351093 is a deficient number, since it is larger than the sum of its proper divisors (1).

18620351093 is an equidigital number, since it uses as much as digits as its factorization.

18620351093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 18620351093 in words is "eighteen billion, six hundred twenty million, three hundred fifty-one thousand, ninety-three".