20406334 has 8 divisors (see below), whose sum is σ = 32964120. Its totient is φ = 9418296.

The previous prime is 20406329. The next prime is 20406349. The reversal of 20406334 is 43360402.

It is a sphenic number, since it is the product of 3 distinct 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 in 3 ways as a sum of consecutive naturals, for example, 392404 + ... + 392455.

It is an arithmetic number, because the mean of its divisors is an integer number (4120515).

Almost surely, 2^20406334 is an apocalyptic number.

20406334 is a deficient number, since it is larger than the sum of its proper divisors (12557786).

20406334 is a wasteful number, since it uses less digits than its factorization.

20406334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784874.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20406334 is about 4517.3370474207. The cubic root of 20406334 is about 273.2677180724.

Adding to 20406334 its reverse (43360402), we get a palindrome (63766736).

The spelling of 20406334 in words is "twenty million, four hundred six thousand, three hundred thirty-four".