18454609650 has 72 divisors (see below), whose sum is σ = 47400363504. Its totient is φ = 4751499200.

The previous prime is 18454609531. The next prime is 18454609651. The reversal of 18454609650 is 5690645481.

It is a self number, because there is not a number n which added to its sum of digits gives 18454609650.

It is not an unprimeable number, because it can be changed into a prime (18454609651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 53005 + ... + 199295.

It is an arithmetic number, because the mean of its divisors is an integer number (658338382).

Almost surely, 2^18454609650 is an apocalyptic number.

18454609650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18454609650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23700181752).

18454609650 is an abundant number, since it is smaller than the sum of its proper divisors (28945753854).

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

18454609650 is a wasteful number, since it uses less digits than its factorization.

18454609650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146364 (or 146330 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 18454609650 in words is "eighteen billion, four hundred fifty-four million, six hundred nine thousand, six hundred fifty".