18340148633 has 4 divisors (see below), whose sum is σ = 18341828880. Its totient is φ = 18338468388.

The previous prime is 18340148627. The next prime is 18340148653. The reversal of 18340148633 is 33684104381.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33684104381 = 19 ⋅1772847599.

It is a cyclic number.

It is not a de Polignac number, because 18340148633 - 2¹⁸ = 18339886489 is a prime.

It is a super-2 number, since 2×18340148633² (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 (18340148623) 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, 823643 + ... + 845616.

It is an arithmetic number, because the mean of its divisors is an integer number (4585457220).

Almost surely, 2^18340148633 is an apocalyptic number.

It is an amenable number.

18340148633 is a deficient number, since it is larger than the sum of its proper divisors (1680247).

18340148633 is a wasteful number, since it uses less digits than its factorization.

18340148633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680246.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 18340148633 in words is "eighteen billion, three hundred forty million, one hundred forty-eight thousand, six hundred thirty-three".