20518822 has 16 divisors (see below), whose sum is σ = 32486400. Its totient is φ = 9693000.

The previous prime is 20518811. The next prime is 20518853. The reversal of 20518822 is 22881502.

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 7 ways as a sum of consecutive naturals, for example, 26947 + ... + 27697.

It is an arithmetic number, because the mean of its divisors is an integer number (2030400).

Almost surely, 2^20518822 is an apocalyptic number.

20518822 is a deficient number, since it is larger than the sum of its proper divisors (11967578).

20518822 is a wasteful number, since it uses less digits than its factorization.

20518822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20518822 is about 4529.7706343699. The cubic root of 20518822 is about 273.7689191348.

The spelling of 20518822 in words is "twenty million, five hundred eighteen thousand, eight hundred twenty-two".