18820900977 has 8 divisors (see below), whose sum is σ = 25095176064. Its totient is φ = 12546946608.

The previous prime is 18820900937. The next prime is 18820900993. The reversal of 18820900977 is 77900902881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18820900977 - 2⁶ = 18820900913 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18820900937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156888 + ... + 249510.

It is an arithmetic number, because the mean of its divisors is an integer number (3136897008).

Almost surely, 2^18820900977 is an apocalyptic number.

It is an amenable number.

18820900977 is a deficient number, since it is larger than the sum of its proper divisors (6274275087).

18820900977 is an equidigital number, since it uses as much as digits as its factorization.

18820900977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160359.

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 18820900977 in words is "eighteen billion, eight hundred twenty million, nine hundred thousand, nine hundred seventy-seven".