18779940450 has 96 divisors (see below), whose sum is σ = 53999222400. Its totient is φ = 4790237760.

The previous prime is 18779940433. The next prime is 18779940451. The reversal of 18779940450 is 5404997781.

18779940450 is a `hidden beast` number, since 1 + 87 + 79 + 9 + 40 + 450 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18779940451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 271365 + ... + 333464.

It is an arithmetic number, because the mean of its divisors is an integer number (562491900).

Almost surely, 2^18779940450 is an apocalyptic number.

18779940450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18779940450 is an abundant number, since it is smaller than the sum of its proper divisors (35219281950).

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

18779940450 is a wasteful number, since it uses less digits than its factorization.

18779940450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604873 (or 604862 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 18779940450 in words is "eighteen billion, seven hundred seventy-nine million, nine hundred forty thousand, four hundred fifty".