18854447061 has 16 divisors (see below), whose sum is σ = 26486461440. Its totient is φ = 11897236080.

The previous prime is 18854446981. The next prime is 18854447077. The reversal of 18854447061 is 16074445881.

It is not a de Polignac number, because 18854447061 - 2⁹ = 18854446549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18854447061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18854447561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87075 + ... + 212816.

It is an arithmetic number, because the mean of its divisors is an integer number (1655403840).

Almost surely, 2^18854447061 is an apocalyptic number.

It is an amenable number.

18854447061 is a deficient number, since it is larger than the sum of its proper divisors (7632014379).

18854447061 is a wasteful number, since it uses less digits than its factorization.

18854447061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301016.

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 18854447061 in words is "eighteen billion, eight hundred fifty-four million, four hundred forty-seven thousand, sixty-one".