20649822 has 16 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 6871832.

The previous prime is 20649821. The next prime is 20649829. The reversal of 20649822 is 22894602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20649821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579 + ... + 6617.

It is an arithmetic number, because the mean of its divisors is an integer number (2585520).

Almost surely, 2^20649822 is an apocalyptic number.

20649822 is an abundant number, since it is smaller than the sum of its proper divisors (20718498).

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

20649822 is a wasteful number, since it uses less digits than its factorization.

20649822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20649822 is about 4544.2075216698. The cubic root of 20649822 is about 274.3502987641.

The spelling of 20649822 in words is "twenty million, six hundred forty-nine thousand, eight hundred twenty-two".