20071908 has 48 divisors (see below), whose sum is σ = 53455360. Its totient is φ = 6508512.

The previous prime is 20071907. The next prime is 20071921. The reversal of 20071908 is 80917002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485 + ... + 6507.

Almost surely, 2^20071908 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 20071908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26727680).

20071908 is an abundant number, since it is smaller than the sum of its proper divisors (33383452).

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

20071908 is a wasteful number, since it uses less digits than its factorization.

20071908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073 (or 5065 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20071908 is about 4480.1683004102. The cubic root of 20071908 is about 271.7666864618.

The spelling of 20071908 in words is "twenty million, seventy-one thousand, nine hundred eight".