20854603 has 16 divisors (see below), whose sum is σ = 26150400. Its totient is φ = 16156800.

The previous prime is 20854601. The next prime is 20854649. The reversal of 20854603 is 30645802.

It is not a de Polignac number, because 20854603 - 2¹ = 20854601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20854601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14643 + ... + 16003.

It is an arithmetic number, because the mean of its divisors is an integer number (1634400).

Almost surely, 2^20854603 is an apocalyptic number.

20854603 is a deficient number, since it is larger than the sum of its proper divisors (5295797).

20854603 is a wasteful number, since it uses less digits than its factorization.

20854603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20854603 is about 4566.6840267310. The cubic root of 20854603 is about 275.2542134144.

The spelling of 20854603 in words is "twenty million, eight hundred fifty-four thousand, six hundred three".