20747853 has 32 divisors (see below), whose sum is σ = 35409920. Its totient is φ = 11761200.

The previous prime is 20747827. The next prime is 20747873. The reversal of 20747853 is 35874702.

It is not a de Polignac number, because 20747853 - 2⁹ = 20747341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20747873) 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 31 ways as a sum of consecutive naturals, for example, 28176 + ... + 28902.

It is an arithmetic number, because the mean of its divisors is an integer number (1106560).

Almost surely, 2^20747853 is an apocalyptic number.

It is an amenable number.

20747853 is a deficient number, since it is larger than the sum of its proper divisors (14662067).

20747853 is a wasteful number, since it uses less digits than its factorization.

20747853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 20747853 is about 4554.9811196096. The cubic root of 20747853 is about 274.7837550703.

The spelling of 20747853 in words is "twenty million, seven hundred forty-seven thousand, eight hundred fifty-three".