18862826881 has 4 divisors (see below), whose sum is σ = 18875312064. Its totient is φ = 18850341700.

The previous prime is 18862826839. The next prime is 18862826911.

18862826881 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-18862826881 is a prime.

It is a super-2 number, since 2×18862826881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18862826681) 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, 6240325 + ... + 6243346.

It is an arithmetic number, because the mean of its divisors is an integer number (4718828016).

Almost surely, 2^18862826881 is an apocalyptic number.

It is an amenable number.

18862826881 is a deficient number, since it is larger than the sum of its proper divisors (12485183).

18862826881 is a wasteful number, since it uses less digits than its factorization.

18862826881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12485182.

The product of its digits is 4718592, while the sum is 58.

The spelling of 18862826881 in words is "eighteen billion, eight hundred sixty-two million, eight hundred twenty-six thousand, eight hundred eighty-one".