18425428787 has 2 divisors, whose sum is σ = 18425428788. Its totient is φ = 18425428786.

The previous prime is 18425428781. The next prime is 18425428829. The reversal of 18425428787 is 78782452481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18425428787 - 2¹² = 18425424691 is a prime.

It is not a weakly prime, because it can be changed into another prime (18425428781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9212714393 + 9212714394.

It is an arithmetic number, because the mean of its divisors is an integer number (9212714394).

Almost surely, 2^18425428787 is an apocalyptic number.

18425428787 is a deficient number, since it is larger than the sum of its proper divisors (1).

18425428787 is an equidigital number, since it uses as much as digits as its factorization.

18425428787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8028160, while the sum is 56.

The spelling of 18425428787 in words is "eighteen billion, four hundred twenty-five million, four hundred twenty-eight thousand, seven hundred eighty-seven".