18977120041 has 4 divisors (see below), whose sum is σ = 20702312784. Its totient is φ = 17251927300.

The previous prime is 18977120033. The next prime is 18977120081. The reversal of 18977120041 is 14002177981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18977120041 - 2³ = 18977120033 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18977119976 and 18977120003.

It is not an unprimeable number, because it can be changed into a prime (18977120081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862596355 + ... + 862596376.

It is an arithmetic number, because the mean of its divisors is an integer number (5175578196).

Almost surely, 2^18977120041 is an apocalyptic number.

18977120041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18977120041 is a deficient number, since it is larger than the sum of its proper divisors (1725192743).

18977120041 is a wasteful number, since it uses less digits than its factorization.

18977120041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725192742.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 18977120041 in words is "eighteen billion, nine hundred seventy-seven million, one hundred twenty thousand, forty-one".