18898461611 has 2 divisors, whose sum is σ = 18898461612. Its totient is φ = 18898461610.

The previous prime is 18898461563. The next prime is 18898461623. The reversal of 18898461611 is 11616489881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18898461611 - 2¹⁰ = 18898460587 is a prime.

It is not a weakly prime, because it can be changed into another prime (18898461661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449230805 + 9449230806.

It is an arithmetic number, because the mean of its divisors is an integer number (9449230806).

Almost surely, 2^18898461611 is an apocalyptic number.

18898461611 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898461611 is an equidigital number, since it uses as much as digits as its factorization.

18898461611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 53.

The spelling of 18898461611 in words is "eighteen billion, eight hundred ninety-eight million, four hundred sixty-one thousand, six hundred eleven".