20908935 has 24 divisors (see below), whose sum is σ = 37586640. Its totient is φ = 11150784.

The previous prime is 20908933. The next prime is 20908957. The reversal of 20908935 is 53980902.

It is not a de Polignac number, because 20908935 - 2¹ = 20908933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20908935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20908931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7390 + ... + 9819.

It is an arithmetic number, because the mean of its divisors is an integer number (1566110).

Almost surely, 2^20908935 is an apocalyptic number.

20908935 is a deficient number, since it is larger than the sum of its proper divisors (16677705).

20908935 is an equidigital number, since it uses as much as digits as its factorization.

20908935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17229 (or 17217 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 20908935 is about 4572.6288937547. The cubic root of 20908935 is about 275.4930438745.

It can be divided in two parts, 2090 and 8935, that added together give a square (11025 = 105²).

The spelling of 20908935 in words is "twenty million, nine hundred eight thousand, nine hundred thirty-five".