20773138 has 8 divisors (see below), whose sum is σ = 31747788. Its totient is φ = 10190544.

The previous prime is 20773127. The next prime is 20773139. The reversal of 20773138 is 83137702.

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 6889 = 4557^2 + 83^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20773139) 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 3 ways as a sum of consecutive naturals, for example, 97881 + ... + 98092.

Almost surely, 2^20773138 is an apocalyptic number.

20773138 is a deficient number, since it is larger than the sum of its proper divisors (10974650).

20773138 is a wasteful number, since it uses less digits than its factorization.

20773138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196028.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20773138 is about 4557.7558074122. The cubic root of 20773138 is about 274.8953342737.

The spelling of 20773138 in words is "twenty million, seven hundred seventy-three thousand, one hundred thirty-eight".