20780652 has 12 divisors (see below), whose sum is σ = 48488216. Its totient is φ = 6926880.

The previous prime is 20780581. The next prime is 20780657. The reversal of 20780652 is 25608702.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20780657) 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, 865849 + ... + 865872.

Almost surely, 2^20780652 is an apocalyptic number.

It is an amenable number.

20780652 is an abundant number, since it is smaller than the sum of its proper divisors (27707564).

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

20780652 is a wasteful number, since it uses less digits than its factorization.

20780652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731728 (or 1731726 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20780652 is about 4558.5800420745. The cubic root of 20780652 is about 274.9284750626.

The spelling of 20780652 in words is "twenty million, seven hundred eighty thousand, six hundred fifty-two".