18474578429 has 2 divisors, whose sum is σ = 18474578430. Its totient is φ = 18474578428.

The previous prime is 18474578413. The next prime is 18474578431. The reversal of 18474578429 is 92487547481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18163761529 + 310816900 = 134773^2 + 17630^2 .

It is a cyclic number.

It is not a de Polignac number, because 18474578429 - 2⁴ = 18474578413 is a prime.

Together with 18474578431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18474574429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237289214 + 9237289215.

It is an arithmetic number, because the mean of its divisors is an integer number (9237289215).

Almost surely, 2^18474578429 is an apocalyptic number.

It is an amenable number.

18474578429 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474578429 is an equidigital number, since it uses as much as digits as its factorization.

18474578429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 59.

The spelling of 18474578429 in words is "eighteen billion, four hundred seventy-four million, five hundred seventy-eight thousand, four hundred twenty-nine".