18410961969 has 27 divisors (see below), whose sum is σ = 27497990169. Its totient is φ = 11869898760.

The previous prime is 18410961967. The next prime is 18410961997. The reversal of 18410961969 is 96916901481.

The square root of 18410961969 is 135687.

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

18410961969 is a `hidden beast` number, since 1 + 8 + 4 + 10 + 9 + 619 + 6 + 9 = 666.

It is not a de Polignac number, because 18410961969 - 2¹ = 18410961967 is a prime.

It is a super-2 number, since 2×18410961969² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18410961967) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12618162 + ... + 12619620.

Almost surely, 2^18410961969 is an apocalyptic number.

18410961969 is the 135687-th square number.

18410961969 is the 67844-th centered octagonal number.

It is an amenable number.

18410961969 is a deficient number, since it is larger than the sum of its proper divisors (9087028200).

18410961969 is an frugal number, since it uses more digits than its factorization.

18410961969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 18410961969 in words is "eighteen billion, four hundred ten million, nine hundred sixty-one thousand, nine hundred sixty-nine".