18864856450 has 96 divisors (see below), whose sum is σ = 40918131072. Its totient is φ = 6401472000.

The previous prime is 18864856433. The next prime is 18864856453. The reversal of 18864856450 is 5465846881.

It is a super-3 number, since 3×18864856450³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 18864856391 and 18864856400.

It is not an unprimeable number, because it can be changed into a prime (18864856453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500464 + ... + 536836.

It is an arithmetic number, because the mean of its divisors is an integer number (426230532).

Almost surely, 2^18864856450 is an apocalyptic number.

18864856450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18864856450 is an abundant number, since it is smaller than the sum of its proper divisors (22053274622).

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

18864856450 is a wasteful number, since it uses less digits than its factorization.

18864856450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36460 (or 36455 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 55.

The spelling of 18864856450 in words is "eighteen billion, eight hundred sixty-four million, eight hundred fifty-six thousand, four hundred fifty".