18220601471 has 2 divisors, whose sum is σ = 18220601472. Its totient is φ = 18220601470.

The previous prime is 18220601461. The next prime is 18220601489. The reversal of 18220601471 is 17410602281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18220601471 - 2⁶ = 18220601407 is a prime.

It is a super-3 number, since 3×18220601471³ (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 (18220601461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9110300735 + 9110300736.

It is an arithmetic number, because the mean of its divisors is an integer number (9110300736).

Almost surely, 2^18220601471 is an apocalyptic number.

18220601471 is a deficient number, since it is larger than the sum of its proper divisors (1).

18220601471 is an equidigital number, since it uses as much as digits as its factorization.

18220601471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 18220601471 in words is "eighteen billion, two hundred twenty million, six hundred one thousand, four hundred seventy-one".