20995122 has 16 divisors (see below), whose sum is σ = 43345152. Its totient is φ = 6772560.

The previous prime is 20995109. The next prime is 20995123. The reversal of 20995122 is 22159902.

It is a self number, because there is not a number n which added to its sum of digits gives 20995122.

It is not an unprimeable number, because it can be changed into a prime (20995123) 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, 56253 + ... + 56624.

It is an arithmetic number, because the mean of its divisors is an integer number (2709072).

Almost surely, 2^20995122 is an apocalyptic number.

20995122 is an abundant number, since it is smaller than the sum of its proper divisors (22350030).

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

20995122 is a wasteful number, since it uses less digits than its factorization.

20995122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112913.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20995122 is about 4582.0434306104. The cubic root of 20995122 is about 275.8710540281.

The spelling of 20995122 in words is "twenty million, nine hundred ninety-five thousand, one hundred twenty-two".