20926818 has 24 divisors (see below), whose sum is σ = 49463856. Its totient is φ = 6341400.

The previous prime is 20926817. The next prime is 20926831. The reversal of 20926818 is 81862902.

It is not an unprimeable number, because it can be changed into a prime (20926811) 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 in 11 ways as a sum of consecutive naturals, for example, 52648 + ... + 53043.

It is an arithmetic number, because the mean of its divisors is an integer number (2060994).

Almost surely, 2^20926818 is an apocalyptic number.

20926818 is an abundant number, since it is smaller than the sum of its proper divisors (28537038).

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

20926818 is a wasteful number, since it uses less digits than its factorization.

20926818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105710 (or 105707 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 20926818 is about 4574.5839155053. The cubic root of 20926818 is about 275.5715627504.

The spelling of 20926818 in words is "twenty million, nine hundred twenty-six thousand, eight hundred eighteen".