18946880868 has 24 divisors (see below), whose sum is σ = 46809941472. Its totient is φ = 5944119424.

The previous prime is 18946880861. The next prime is 18946880903. The reversal of 18946880868 is 86808864981.

It is a happy number.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18946880799 and 18946880808.

It is not an unprimeable number, because it can be changed into a prime (18946880861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46438230 + ... + 46438637.

It is an arithmetic number, because the mean of its divisors is an integer number (1950414228).

Almost surely, 2^18946880868 is an apocalyptic number.

It is an amenable number.

18946880868 is an abundant number, since it is smaller than the sum of its proper divisors (27863060604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18946880868 is a wasteful number, since it uses less digits than its factorization.

18946880868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92876891 (or 92876889 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 66.

The spelling of 18946880868 in words is "eighteen billion, nine hundred forty-six million, eight hundred eighty thousand, eight hundred sixty-eight".