20899896 has 32 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 6947840.

The previous prime is 20899843. The next prime is 20899897. The reversal of 20899896 is 69899802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899897) 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 7 ways as a sum of consecutive naturals, for example, 10120 + ... + 12008.

Almost surely, 2^20899896 is an apocalyptic number.

It is an amenable number.

20899896 is an abundant number, since it is smaller than the sum of its proper divisors (31490904).

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

20899896 is a wasteful number, since it uses less digits than its factorization.

20899896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 20899896 is about 4571.6404058062. The cubic root of 20899896 is about 275.4533393088.

The spelling of 20899896 in words is "twenty million, eight hundred ninety-nine thousand, eight hundred ninety-six".