18441390946851 has 10 divisors (see below), whose sum is σ = 27548250673812. Its totient is φ = 12294260631180.

The previous prime is 18441390946843. The next prime is 18441390946871. The reversal of 18441390946851 is 15864909314481.

18441390946851 is a `hidden beast` number, since 1 + 84 + 4 + 1 + 3 + 90 + 9 + 468 + 5 + 1 = 666.

It is not a de Polignac number, because 18441390946851 - 2³ = 18441390946843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18441390946841) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 113835746505 + ... + 113835746666.

Almost surely, 2^{18441390946851} is an apocalyptic number.

18441390946851 is a deficient number, since it is larger than the sum of its proper divisors (9106859726961).

18441390946851 is an equidigital number, since it uses as much as digits as its factorization.

18441390946851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227671493183 (or 227671493174 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 18441390946851 in words is "eighteen trillion, four hundred forty-one billion, three hundred ninety million, nine hundred forty-six thousand, eight hundred fifty-one".