20892789 has 16 divisors (see below), whose sum is σ = 32020800. Its totient is φ = 13447728.

The previous prime is 20892757. The next prime is 20892857. The reversal of 20892789 is 98729802.

It is not a de Polignac number, because 20892789 - 2⁵ = 20892757 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20892709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12559 + ... + 14124.

It is an arithmetic number, because the mean of its divisors is an integer number (2001300).

Almost surely, 2^20892789 is an apocalyptic number.

20892789 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20892789 is a deficient number, since it is larger than the sum of its proper divisors (11128011).

20892789 is a wasteful number, since it uses less digits than its factorization.

20892789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26721 (or 26715 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 20892789 is about 4570.8630476093. The cubic root of 20892789 is about 275.4221131754.

The spelling of 20892789 in words is "twenty million, eight hundred ninety-two thousand, seven hundred eighty-nine".