18776946841 has 3 divisors (see below), whose sum is σ = 18777083871. Its totient is φ = 18776809812.

The previous prime is 18776946817. The next prime is 18776946857. The reversal of 18776946841 is 14864967781.

The square root of 18776946841 is 137029.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 144696841 + 18632250000 = 12029^2 + 136500^2 .

It is not a de Polignac number, because 18776946841 - 2⁹ = 18776946329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18776946841.

It is not an unprimeable number, because it can be changed into a prime (18776946871) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68515 + ... + 205543.

It is an arithmetic number, because the mean of its divisors is an integer number (6259027957).

Almost surely, 2^18776946841 is an apocalyptic number.

18776946841 is the 137029-th square number.

18776946841 is the 68515-th centered octagonal number.

It is an amenable number.

18776946841 is a deficient number, since it is larger than the sum of its proper divisors (137030).

18776946841 is an frugal number, since it uses more digits than its factorization.

18776946841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274058 (or 137029 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 61.

The spelling of 18776946841 in words is "eighteen billion, seven hundred seventy-six million, nine hundred forty-six thousand, eight hundred forty-one".