19418426025 has 24 divisors (see below), whose sum is σ = 32972841984. Its totient is φ = 10076587200.

The previous prime is 19418426021. The next prime is 19418426051. The reversal of 19418426025 is 52062481491.

It is not a de Polignac number, because 19418426025 - 2² = 19418426021 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19418426021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3496041 + ... + 3501590.

It is an arithmetic number, because the mean of its divisors is an integer number (1373868416).

Almost surely, 2^19418426025 is an apocalyptic number.

19418426025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19418426025 is a deficient number, since it is larger than the sum of its proper divisors (13554415959).

19418426025 is a wasteful number, since it uses less digits than its factorization.

19418426025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6997681 (or 6997676 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 19418426025 in words is "nineteen billion, four hundred eighteen million, four hundred twenty-six thousand, twenty-five".