50421618 has 48 divisors (see below), whose sum is σ = 118512576. Its totient is φ = 15400800.

The previous prime is 50421599. The next prime is 50421641. The reversal of 50421618 is 81612405.

50421618 is a `hidden beast` number, since 5 + 0 + 42 + 1 + 618 = 666.

50421618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 50421591 and 50421600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34621 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (2469012).

Almost surely, 2^50421618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50421618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59256288).

50421618 is an abundant number, since it is smaller than the sum of its proper divisors (68090958).

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

50421618 is a wasteful number, since it uses less digits than its factorization.

50421618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 50421618 is about 7100.8181218786. The cubic root of 50421618 is about 369.4357555074.

It can be divided in two parts, 504 and 21618, that added together give a palindrome (22122).

The spelling of 50421618 in words is "fifty million, four hundred twenty-one thousand, six hundred eighteen".