18377326969 has 9 divisors (see below), whose sum is σ = 18993610479. Its totient is φ = 17780443080.

The previous prime is 18377326951. The next prime is 18377326997. The reversal of 18377326969 is 96962377381.

The square root of 18377326969 is 135563.

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

It can be written as a sum of positive squares in only one way, i.e., 10560645225 + 7816681744 = 102765^2 + 88412^2 .

It is not a de Polignac number, because 18377326969 - 2⁵ = 18377326937 is a prime.

It is a super-2 number, since 2×18377326969² (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 (18377326909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4200267 + ... + 4204639.

Almost surely, 2^18377326969 is an apocalyptic number.

18377326969 is the 135563-rd square number.

18377326969 is the 67782-nd centered octagonal number.

It is an amenable number.

18377326969 is a deficient number, since it is larger than the sum of its proper divisors (616283510).

18377326969 is an frugal number, since it uses more digits than its factorization.

18377326969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8808 (or 4404 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 61.

The spelling of 18377326969 in words is "eighteen billion, three hundred seventy-seven million, three hundred twenty-six thousand, nine hundred sixty-nine".