50018421 has 4 divisors (see below), whose sum is σ = 66691232. Its totient is φ = 33345612.

The previous prime is 50018411. The next prime is 50018429. The reversal of 50018421 is 12481005.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 50018421 - 2⁵ = 50018389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50018429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8336401 + ... + 8336406.

It is an arithmetic number, because the mean of its divisors is an integer number (16672808).

Almost surely, 2^50018421 is an apocalyptic number.

It is an amenable number.

50018421 is a deficient number, since it is larger than the sum of its proper divisors (16672811).

50018421 is a wasteful number, since it uses less digits than its factorization.

50018421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16672810.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 50018421 is about 7072.3702533168. The cubic root of 50018421 is about 368.4483866719.

Adding to 50018421 its reverse (12481005), we get a palindrome (62499426).

The spelling of 50018421 in words is "fifty million, eighteen thousand, four hundred twenty-one".