18786880990 has 32 divisors (see below), whose sum is σ = 35611956000. Its totient is φ = 7116087168.

The previous prime is 18786880813. The next prime is 18786880991. The reversal of 18786880990 is 9908868781.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18786880991) 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, 433216 + ... + 474604.

It is an arithmetic number, because the mean of its divisors is an integer number (1112873625).

Almost surely, 2^18786880990 is an apocalyptic number.

18786880990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18786880990 is a deficient number, since it is larger than the sum of its proper divisors (16825075010).

18786880990 is a wasteful number, since it uses less digits than its factorization.

18786880990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43804.

The product of its (nonzero) digits is 13934592, while the sum is 64.

The spelling of 18786880990 in words is "eighteen billion, seven hundred eighty-six million, eight hundred eighty thousand, nine hundred ninety".