18807477061 has 2 divisors, whose sum is σ = 18807477062. Its totient is φ = 18807477060.

The previous prime is 18807477019. The next prime is 18807477181. The reversal of 18807477061 is 16077470881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17484772900 + 1322704161 = 132230^2 + 36369^2 .

It is a cyclic number.

It is not a de Polignac number, because 18807477061 - 2²¹ = 18805379909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18807476996 and 18807477014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18807477001) 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 as a sum of consecutive naturals, namely, 9403738530 + 9403738531.

It is an arithmetic number, because the mean of its divisors is an integer number (9403738531).

Almost surely, 2^18807477061 is an apocalyptic number.

It is an amenable number.

18807477061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18807477061 is an equidigital number, since it uses as much as digits as its factorization.

18807477061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 526848, while the sum is 49.

The spelling of 18807477061 in words is "eighteen billion, eight hundred seven million, four hundred seventy-seven thousand, sixty-one".