18649168011 has 48 divisors (see below), whose sum is σ = 29601093600. Its totient is φ = 11261451264.

The previous prime is 18649168001. The next prime is 18649168019. The reversal of 18649168011 is 11086194681.

It is a happy number.

18649168011 is a `hidden beast` number, since 1 + 86 + 491 + 6 + 80 + 1 + 1 = 666.

It is not a de Polignac number, because 18649168011 - 2⁷ = 18649167883 is a prime.

It is a super-2 number, since 2×18649168011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18649168019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1399900 + ... + 1413158.

It is an arithmetic number, because the mean of its divisors is an integer number (616689450).

Almost surely, 2^18649168011 is an apocalyptic number.

18649168011 is a deficient number, since it is larger than the sum of its proper divisors (10951925589).

18649168011 is a wasteful number, since it uses less digits than its factorization.

18649168011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628 (or 13625 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18649168011 in words is "eighteen billion, six hundred forty-nine million, one hundred sixty-eight thousand, eleven".