20834438 has 4 divisors (see below), whose sum is σ = 31251660. Its totient is φ = 10417218.

The previous prime is 20834417. The next prime is 20834461. The reversal of 20834438 is 83443802.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5208608 + ... + 5208611.

It is an arithmetic number, because the mean of its divisors is an integer number (7812915).

Almost surely, 2^20834438 is an apocalyptic number.

20834438 is a deficient number, since it is larger than the sum of its proper divisors (10417222).

20834438 is a wasteful number, since it uses less digits than its factorization.

20834438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10417221.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 20834438 is about 4564.4756544427. The cubic root of 20834438 is about 275.1654673606.

The spelling of 20834438 in words is "twenty million, eight hundred thirty-four thousand, four hundred thirty-eight".