20021834 has 8 divisors (see below), whose sum is σ = 34323168. Its totient is φ = 8580780.

The previous prime is 20021831. The next prime is 20021843. The reversal of 20021834 is 43812002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20021831) 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, 715052 + ... + 715079.

It is an arithmetic number, because the mean of its divisors is an integer number (4290396).

Almost surely, 2^20021834 is an apocalyptic number.

20021834 is a deficient number, since it is larger than the sum of its proper divisors (14301334).

20021834 is a wasteful number, since it uses less digits than its factorization.

20021834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430140.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20021834 is about 4474.5764045326. The cubic root of 20021834 is about 271.5405033932.

Adding to 20021834 its reverse (43812002), we get a palindrome (63833836).

The spelling of 20021834 in words is "twenty million, twenty-one thousand, eight hundred thirty-four".