20011896 has 48 divisors (see below), whose sum is σ = 54405000. Its totient is φ = 6645312.

The previous prime is 20011841. The next prime is 20011913. The reversal of 20011896 is 69811002.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 35650 + ... + 36206.

Almost surely, 2^20011896 is an apocalyptic number.

It is an amenable number.

20011896 is an abundant number, since it is smaller than the sum of its proper divisors (34393104).

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

20011896 is a wasteful number, since it uses less digits than its factorization.

20011896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20011896 is about 4473.4657705184. The cubic root of 20011896 is about 271.4955688460.

Adding to 20011896 its reverse (69811002), we get a palindrome (89822898).

The spelling of 20011896 in words is "twenty million, eleven thousand, eight hundred ninety-six".