30421893 has 16 divisors (see below), whose sum is σ = 42480000. Its totient is φ = 19329024.

The previous prime is 30421871. The next prime is 30421901. The reversal of 30421893 is 39812403.

It is not a de Polignac number, because 30421893 - 2⁸ = 30421637 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30421893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30421693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23733 + ... + 24981.

It is an arithmetic number, because the mean of its divisors is an integer number (2655000).

Almost surely, 2^30421893 is an apocalyptic number.

It is an amenable number.

30421893 is a deficient number, since it is larger than the sum of its proper divisors (12058107).

30421893 is a wasteful number, since it uses less digits than its factorization.

30421893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 30421893 is about 5515.6044999619. The cubic root of 30421893 is about 312.1730528304.

The spelling of 30421893 in words is "thirty million, four hundred twenty-one thousand, eight hundred ninety-three".