20854775 has 12 divisors (see below), whose sum is σ = 25941792. Its totient is φ = 16631040.

The previous prime is 20854739. The next prime is 20854843. The reversal of 20854775 is 57745802.

It is not a de Polignac number, because 20854775 - 2⁶ = 20854711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8039 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (2161816).

Almost surely, 2^20854775 is an apocalyptic number.

20854775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20854775 is a deficient number, since it is larger than the sum of its proper divisors (5087017).

20854775 is a wasteful number, since it uses less digits than its factorization.

20854775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 20854775 is about 4566.7028587374. The cubic root of 20854775 is about 275.2549701393.

The spelling of 20854775 in words is "twenty million, eight hundred fifty-four thousand, seven hundred seventy-five".