18916077907448 has 16 divisors (see below), whose sum is σ = 37553978198880. Its totient is φ = 8901683721088.

The previous prime is 18916077907427. The next prime is 18916077907483. The reversal of 18916077907448 is 84470977061981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69544403936 + ... + 69544404207.

It is an arithmetic number, because the mean of its divisors is an integer number (2347123637430).

Almost surely, 2^{18916077907448} is an apocalyptic number.

It is an amenable number.

18916077907448 is a deficient number, since it is larger than the sum of its proper divisors (18637900291432).

18916077907448 is a wasteful number, since it uses less digits than its factorization.

18916077907448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139088808166 (or 139088808162 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 71.

The spelling of 18916077907448 in words is "eighteen trillion, nine hundred sixteen billion, seventy-seven million, nine hundred seven thousand, four hundred forty-eight".