21230034 has 24 divisors (see below), whose sum is σ = 49393008. Its totient is φ = 6065640.

The previous prime is 21230023. The next prime is 21230047. The reversal of 21230034 is 43003212.

It is a junction number, because it is equal to n+sod(n) for n = 21229995 and 21230022.

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 11 ways as a sum of consecutive naturals, for example, 35812 + ... + 36399.

It is an arithmetic number, because the mean of its divisors is an integer number (2058042).

Almost surely, 2^21230034 is an apocalyptic number.

21230034 is an abundant number, since it is smaller than the sum of its proper divisors (28162974).

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

21230034 is a wasteful number, since it uses less digits than its factorization.

21230034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72230 (or 72223 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21230034 is about 4607.6061029563. The cubic root of 21230034 is about 276.8961367786.

Adding to 21230034 its reverse (43003212), we get a palindrome (64233246).

The spelling of 21230034 in words is "twenty-one million, two hundred thirty thousand, thirty-four".