20773040 has 40 divisors (see below), whose sum is σ = 48785568. Its totient is φ = 8225280.

The previous prime is 20772949. The next prime is 20773043. The reversal of 20773040 is 4037702.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 20772997 and 20773015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773043) 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 7 ways as a sum of consecutive naturals, for example, 6980 + ... + 9500.

Almost surely, 2^20773040 is an apocalyptic number.

20773040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20773040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24392784).

20773040 is an abundant number, since it is smaller than the sum of its proper divisors (28012528).

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

20773040 is a wasteful number, since it uses less digits than its factorization.

20773040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20773040 is about 4557.7450564945. The cubic root of 20773040 is about 274.8949019881.

The spelling of 20773040 in words is "twenty million, seven hundred seventy-three thousand, forty".