20859892 has 18 divisors (see below), whose sum is σ = 36998738. Its totient is φ = 10290672.

The previous prime is 20859889. The next prime is 20859893. The reversal of 20859892 is 29895802.

It can be written as a sum of positive squares in only one way, i.e., 18627856 + 2232036 = 4316^2 + 1494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20859893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27178 + ... + 27934.

Almost surely, 2^20859892 is an apocalyptic number.

It is an amenable number.

20859892 is a deficient number, since it is larger than the sum of its proper divisors (16138846).

20859892 is an equidigital number, since it uses as much as digits as its factorization.

20859892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 20859892 is about 4567.2630754096. The cubic root of 20859892 is about 275.2774808034.

It can be divided in two parts, 208 and 59892, that multiplied together give a triangular number (12457536 = T₄₉₉₁).

The spelling of 20859892 in words is "twenty million, eight hundred fifty-nine thousand, eight hundred ninety-two".