20761908 has 48 divisors (see below), whose sum is σ = 52261440. Its totient is φ = 6393600.

The previous prime is 20761907. The next prime is 20761919. The reversal of 20761908 is 80916702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761901) 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 15 ways as a sum of consecutive naturals, for example, 8238 + ... + 10458.

It is an arithmetic number, because the mean of its divisors is an integer number (1088780).

Almost surely, 2^20761908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20761908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26130720).

20761908 is an abundant number, since it is smaller than the sum of its proper divisors (31499532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20761908 is a wasteful number, since it uses less digits than its factorization.

20761908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 20761908 is about 4556.5236749083. The cubic root of 20761908 is about 274.8457890218.

The spelling of 20761908 in words is "twenty million, seven hundred sixty-one thousand, nine hundred eight".