20150822 has 4 divisors (see below), whose sum is σ = 30226236. Its totient is φ = 10075410.

The previous prime is 20150821. The next prime is 20150833. The reversal of 20150822 is 22805102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20150794 and 20150803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150821) by changing a digit.

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, 5037704 + ... + 5037707.

It is an arithmetic number, because the mean of its divisors is an integer number (7556559).

Almost surely, 2^20150822 is an apocalyptic number.

20150822 is a deficient number, since it is larger than the sum of its proper divisors (10075414).

20150822 is a wasteful number, since it uses less digits than its factorization.

20150822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075413.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20150822 is about 4488.9666962454. The cubic root of 20150822 is about 272.1223768098.

Adding to 20150822 its reverse (22805102), we get a palindrome (42955924).

The spelling of 20150822 in words is "twenty million, one hundred fifty thousand, eight hundred twenty-two".