20813854 has 16 divisors (see below), whose sum is σ = 33177600. Its totient is φ = 9765144.

The previous prime is 20813839. The next prime is 20813879. The reversal of 20813854 is 45831802.

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, 1507 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (2073600).

Almost surely, 2^20813854 is an apocalyptic number.

20813854 is a deficient number, since it is larger than the sum of its proper divisors (12363746).

20813854 is a wasteful number, since it uses less digits than its factorization.

20813854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 20813854 is about 4562.2202927960. The cubic root of 20813854 is about 275.0748182101.

The spelling of 20813854 in words is "twenty million, eight hundred thirteen thousand, eight hundred fifty-four".