20796885 has 32 divisors (see below), whose sum is σ = 37294080. Its totient is φ = 10995264.

The previous prime is 20796871. The next prime is 20796901. The reversal of 20796885 is 58869702.

It is not a de Polignac number, because 20796885 - 2⁴ = 20796869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20796885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16539 + ... + 17751.

It is an arithmetic number, because the mean of its divisors is an integer number (1165440).

Almost surely, 2^20796885 is an apocalyptic number.

It is an amenable number.

20796885 is a deficient number, since it is larger than the sum of its proper divisors (16497195).

20796885 is a wasteful number, since it uses less digits than its factorization.

20796885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20796885 is about 4560.3601831434. The cubic root of 20796885 is about 275.0000440771. Note that the first 4 decimals are identical.

The spelling of 20796885 in words is "twenty million, seven hundred ninety-six thousand, eight hundred eighty-five".