18202231001 has 2 divisors, whose sum is σ = 18202231002. Its totient is φ = 18202231000.

The previous prime is 18202230941. The next prime is 18202231051. The reversal of 18202231001 is 10013220281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13583669401 + 4618561600 = 116549^2 + 67960^2 .

It is an emirp because it is prime and its reverse (10013220281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18202231001 - 2²² = 18198036697 is a prime.

It is not a weakly prime, because it can be changed into another prime (18202231051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101115500 + 9101115501.

It is an arithmetic number, because the mean of its divisors is an integer number (9101115501).

Almost surely, 2^18202231001 is an apocalyptic number.

It is an amenable number.

18202231001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202231001 is an equidigital number, since it uses as much as digits as its factorization.

18202231001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 18202231001 its reverse (10013220281), we get a palindrome (28215451282).

The spelling of 18202231001 in words is "eighteen billion, two hundred two million, two hundred thirty-one thousand, one".