20896780 has 12 divisors (see below), whose sum is σ = 43883280. Its totient is φ = 8358704.

The previous prime is 20896741. The next prime is 20896781. The reversal of 20896780 is 8769802.

It is not an unprimeable number, because it can be changed into a prime (20896781) 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 3 ways as a sum of consecutive naturals, for example, 522400 + ... + 522439.

It is an arithmetic number, because the mean of its divisors is an integer number (3656940).

Almost surely, 2^20896780 is an apocalyptic number.

20896780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20896780 is an abundant number, since it is smaller than the sum of its proper divisors (22986500).

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

20896780 is a wasteful number, since it uses less digits than its factorization.

20896780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044848 (or 1044846 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20896780 is about 4571.2995963949. The cubic root of 20896780 is about 275.4396493641.

The spelling of 20896780 in words is "twenty million, eight hundred ninety-six thousand, seven hundred eighty".