20773990 has 8 divisors (see below), whose sum is σ = 37393200. Its totient is φ = 8309592.

The previous prime is 20773979. The next prime is 20773997. The reversal of 20773990 is 9937702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038690 + ... + 1038709.

It is an arithmetic number, because the mean of its divisors is an integer number (4674150).

Almost surely, 2^20773990 is an apocalyptic number.

20773990 is a deficient number, since it is larger than the sum of its proper divisors (16619210).

20773990 is a wasteful number, since it uses less digits than its factorization.

20773990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077406.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 20773990 is about 4557.8492735061. The cubic root of 20773990 is about 274.8990924544.

The spelling of 20773990 in words is "twenty million, seven hundred seventy-three thousand, nine hundred ninety".