20765012 has 6 divisors (see below), whose sum is σ = 36338778. Its totient is φ = 10382504.

The previous prime is 20764999. The next prime is 20765027. The reversal of 20765012 is 21056702.

It can be written as a sum of positive squares in only one way, i.e., 14394436 + 6370576 = 3794^2 + 2524^2 .

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 as a sum of consecutive naturals, namely, 2595623 + ... + 2595630.

It is an arithmetic number, because the mean of its divisors is an integer number (6056463).

Almost surely, 2^20765012 is an apocalyptic number.

It is an amenable number.

20765012 is a deficient number, since it is larger than the sum of its proper divisors (15573766).

20765012 is a wasteful number, since it uses less digits than its factorization.

20765012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191257 (or 5191255 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20765012 is about 4556.8642727209. The cubic root of 20765012 is about 274.8594852392.

The spelling of 20765012 in words is "twenty million, seven hundred sixty-five thousand, twelve".