18002727401 has 2 divisors, whose sum is σ = 18002727402. Its totient is φ = 18002727400.

The previous prime is 18002727367. The next prime is 18002727461. The reversal of 18002727401 is 10472720081.

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., 9530445376 + 8472282025 = 97624^2 + 92045^2 .

It is an emirp because it is prime and its reverse (10472720081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18002727401 is a prime.

It is not a weakly prime, because it can be changed into another prime (18002727461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001363700 + 9001363701.

It is an arithmetic number, because the mean of its divisors is an integer number (9001363701).

Almost surely, 2^18002727401 is an apocalyptic number.

It is an amenable number.

18002727401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18002727401 is an equidigital number, since it uses as much as digits as its factorization.

18002727401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The spelling of 18002727401 in words is "eighteen billion, two million, seven hundred twenty-seven thousand, four hundred one".