18323946450 has 36 divisors (see below), whose sum is σ = 49230337338. Its totient is φ = 4886385600.

The previous prime is 18323946419. The next prime is 18323946481. The reversal of 18323946450 is 5464932381.

18323946450 is a `hidden beast` number, since 183 + 2 + 3 + 9 + 464 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (18323946419) and next prime (18323946481).

It can be written as a sum of positive squares in 3 ways, for example, as 15426385209 + 2897561241 = 124203^2 + 53829^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18323946396 and 18323946405.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20359491 + ... + 20360390.

Almost surely, 2^18323946450 is an apocalyptic number.

18323946450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18323946450 is an abundant number, since it is smaller than the sum of its proper divisors (30906390888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18323946450 is a wasteful number, since it uses less digits than its factorization.

18323946450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40719899 (or 40719891 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 18323946450 in words is "eighteen billion, three hundred twenty-three million, nine hundred forty-six thousand, four hundred fifty".