20008992 has 48 divisors (see below), whose sum is σ = 52792992. Its totient is φ = 6635520.

The previous prime is 20008991. The next prime is 20008999. The reversal of 20008992 is 29980002.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20008991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24267 + ... + 25077.

It is an arithmetic number, because the mean of its divisors is an integer number (1099854).

Almost surely, 2^20008992 is an apocalyptic number.

It is an amenable number.

20008992 is an abundant number, since it is smaller than the sum of its proper divisors (32784000).

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

20008992 is a wasteful number, since it uses less digits than its factorization.

20008992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20008992 is about 4473.1411781879. The cubic root of 20008992 is about 271.4824356364.

Adding to 20008992 its reverse (29980002), we get a palindrome (49988994).

The spelling of 20008992 in words is "twenty million, eight thousand, nine hundred ninety-two".