20783848 has 8 divisors (see below), whose sum is σ = 38969730. Its totient is φ = 10391920.

The previous prime is 20783839. The next prime is 20783879. The reversal of 20783848 is 84838702.

It can be written as a sum of positive squares in only one way, i.e., 18818244 + 1965604 = 4338^2 + 1402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20783848.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298983 + ... + 1298998.

Almost surely, 2^20783848 is an apocalyptic number.

It is an amenable number.

20783848 is a deficient number, since it is larger than the sum of its proper divisors (18185882).

20783848 is a wasteful number, since it uses less digits than its factorization.

20783848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597987 (or 2597983 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 20783848 is about 4558.9305763523. The cubic root of 20783848 is about 274.9425687231.

The spelling of 20783848 in words is "twenty million, seven hundred eighty-three thousand, eight hundred forty-eight".